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- 0:00Speaker 1: What do you smell like? Do you know? Go ahead,
- 0:03Speaker 1: smell your armpits.
- 0:06Speaker 2: Well, we may just catch a whiff of our smelly
- 0:09Speaker 2: armpits after a long workout and think nothing much of it. Besides, dang,
- 0:13Speaker 2: I'm stinky. There may actually be something else going on.
- 0:17Speaker 2: According to research, our body odor can surprisingly reveal a
- 0:20Speaker 2: few interesting things about us. We know what you're thinking. Really? How?
- 0:26Speaker 2: but there's some pretty fascinating studies, some published by renowned
- 0:29Speaker 2: researchers on what exactly our scent may say about us,
- 0:32Speaker 2: even if we're unaware initially what those things are. So
- 0:36Speaker 2: we're about to break down some scent studies for you.
- 0:39Speaker 2: Here are a few of the things our body odor
- 0:41Speaker 2: reveals about us. Number one, if you're attracted to someone,
- 0:45Speaker 2: do you have a crush? Are you hoping they're just
- 0:47Speaker 2: as attracted to you as you are to them? Well,
- 0:50Speaker 2: you may wanna pile on the fragrance or not. Swiss
- 0:54Speaker 2: biological researcher Klaus Wedekind is known for his famous 1995
- 0:59Speaker 2: sweaty t-shirt study. In the study, researchers had 44 men
- 1:03Speaker 2: wear a clean cotton t-shirt for two nights when they slept.
- 1:06Speaker 2: The men were told to keep the t-shirts in an
- 1:08Speaker 2: open plastic bag when they weren't wearing it. They were
- 1:10Speaker 2: also given odor-free deodorants and told not to eat any
- 1:14Speaker 2: spicy foods or participate in any activities that could affect
- 1:17Speaker 2: the smell of their t-shirt. The day after the male
- 1:19Speaker 2: participants two nights in these cotton t-shirts The researchers then
- 1:23Speaker 2: placed the shirts in identical boxes and had 49 women
- 1:26Speaker 2: smell each box one at a time. T-shirts were separated
- 1:30Speaker 2: into boxes based off the MHC genes. Three shirts that
- 1:33Speaker 2: were similar MHC genes in a box and three shirts
- 1:36Speaker 2: from males with dissimilar MHC genes. Where possible, women smelled
- 1:40Speaker 2: the shirts during the second week of their menstrual cycle.
- 1:43Speaker 2: So what did the researchers find? Women who weren't on
- 1:46Speaker 2: oral contraceptives preferred the men with MHC genes different from theirs.
- 1:52Speaker 2: This was after they rated the scents based on their pleasantness, intensity,
- 1:55Speaker 2: and sexiness. The study even states that the odors of
- 1:59Speaker 2: MHC dissimilar men remind the test women more often of
- 2:02Speaker 2: their own actual or former mates than do the odors
- 2:05Speaker 2: of MHC similar men.
- 2:07Speaker 1: So did your crush turn you down? It could just
- 2:10Speaker 1: be due to your dissimilar MHC genes, my friend.
- 2:12Speaker 2: Too bad.
- 2:14Speaker 1: Or they just weren't feeling it. Nah, it's probably your armpits.
- 2:17Speaker 2: Number two, if you're ill, did you know that your
- 2:20Speaker 2: scent can reveal if you're sick? A study published in
- 2:23Speaker 2: European Neurology found that a dog trained to recognize the
- 2:25Speaker 2: smell of prostate cancer could identify 30 out of 33
- 2:29Speaker 2: prostate cancer patients correctly based on the smell of their
- 2:32Speaker 2: urine samples. Time to train Buster. Open the toilet seat.
- 2:37Speaker 2: But what about t-shirt smells again? Well, in another study,
- 2:40Speaker 2: researchers injected subjects with a compound that would mess with
- 2:42Speaker 2: their immune system, making it seem as if they were sick.
- 2:46Speaker 2: The researchers then had other participants smell their t-shirts. And
- 2:49Speaker 2: you guessed it, the participants could identify which people were
- 2:52Speaker 2: more likely sick. Number three, if you're extroverted, neurotic, or dominant.
- 2:58Speaker 1: Are you extroverted, dominant, neurotic?
- 3:02Speaker 2: Unsure? Time to smell your armpits. A 2012 study published
- 3:06Speaker 2: in the European Journal of Personality found that people who
- 3:09Speaker 2: were neurotic or dominant could be identified by their scent.
- 3:12Speaker 2: How did they collect these scent samples, you may ask?
- 3:15Speaker 2: You guessed it, cotton t-shirts. A classic. 30 male and
- 3:19Speaker 2: 30 female subjects wore a cotton t-shirt for three days straight.
- 3:23Speaker 2: Then 100 males and 100 females rated the t-shirt scent.
- 3:27Speaker 2: The ratings were then compared to a self-assessed personality test
- 3:30Speaker 2: the t-shirt-wearing subjects took before. There was a connection from
- 3:34Speaker 2: scent to three personality types, extroversion, dominance, and neuroticism. Subjects
- 3:40Speaker 2: with those self-assessed personality traits had specific scents that kept
- 3:43Speaker 2: being identified from the participants who rated those smelly teas.
- 3:47Speaker 1: Number four. reveals your age. Can someone smell their age?
- 3:52Speaker 2: A 2012 study published in the PLOS One found that
- 3:54Speaker 2: the elderly actually have a specific scent. The study states,
- 3:58Speaker 2: body odors were sampled from three distinct age groups, young,
- 4:02Speaker 2: 20 to 30 years old, middle age, 45 to 55,
- 4:06Speaker 2: and old age, 75 to 95 individuals. Perpetual ratings and
- 4:10Speaker 2: age discrimination performance were assessed in 41 young participants. Were
- 4:15Speaker 2: these body odors sampled from cotton t-shirts? We may never know,
- 4:19Speaker 2: but the study findings are pretty interesting. The study explains,
- 4:23Speaker 2: participants were able to discriminate between age categories with body
- 4:26Speaker 2: odor from old age donors mediating the effect also after
- 4:30Speaker 2: removing variants explained by intensity differences. Similarly, participants were able
- 4:34Speaker 2: to correctly assign age labels to body odors originating from
- 4:38Speaker 2: old age donors, but not to body odors originating from
- 4:41Speaker 2: other age groups. So do old people have a distinct smell?
- 4:45Speaker 2: According to this study, they may. And no, it's not
- 4:48Speaker 2: the smell of old books or chicken casserole. Number five,
- 4:52Speaker 2: what foods you eat and if you drink alcohol often.
- 4:55Speaker 2: Did you know some foods do indeed contribute to your
- 4:58Speaker 2: body odor? Yeah, you probably know that you smell like
- 5:01Speaker 2: the garlic fries you scarfed down an hour ago, but still,
- 5:04Speaker 2: that sweaty cotton t-shirt you're wearing probably smells like garlic too.
- 5:08Speaker 2: And not just because you dropped a couple fries on it.
- 5:11Speaker 2: The Berkeley Wellness Center actually lists some foods that can
- 5:13Speaker 2: affect your body odor. Red meat, cabbage, alcohol, they can
- 5:18Speaker 2: mess with your scent. Notably, eating many foods high in
- 5:21Speaker 2: sulfur can cause the body to excrete that high quantity
- 5:24Speaker 2: of sulfur from the body through sweat. Looks like junk
- 5:27Speaker 2: food can also make you smell a specific way too.
- 5:29Speaker 2: An article from HuffPost explains that it's thought that the
- 5:32Speaker 2: sugar present in the blood after eating junk food alters
- 5:35Speaker 2: the makeup of perspiration in some people when it combines
- 5:38Speaker 2: with bacteria on the skin, leading to changes in odor.
- 5:42Speaker 2: So if you don't want to smell like your blood
- 5:43Speaker 2: is sugary, then take it easy on the junk food
- 5:46Speaker 2: for a while. Who knows what that cotton t-shirt smells
- 5:48Speaker 2: like after that plate of nachos?
- 5:51Speaker 1: Probably cheese.
- 5:52Speaker 2: So, were you surprised about what your scent can reveal
- 5:54Speaker 2: about you? feel free to let us know in the
- 5:56Speaker 2: comments down below. Odds are your crush won't consciously decline
- 6:00Speaker 2: your date invite due to your scent. That is, unless
- 6:03Speaker 2: you just got done eating garlic fries when you asked
- 6:05Speaker 2: them up close in their ear, inches away from their nostrils.
- 6:09Speaker 1: Garlic fries and nachos, cheesy, worth it.
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- 6:21Speaker 1: See you next time, Psych2Goers.