this post was submitted on 10 Jan 2026
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Why is kissing? (piefed.blahaj.zone)
submitted 1 day ago* (last edited 1 day ago) by sem@piefed.blahaj.zone to c/nostupidquestions@lemmy.world
 

Asked in a funny way, but what do you think legitimately? Why do people kiss? Is it evolutionarily advantageous? Why not just touch ears together or something? Why do you personally kiss? Do you also wonder why is kissing?

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[–] Mostly_Gristle@lemmy.world 6 points 1 day ago (1 children)

I'm trying to remember this from a podcast I listened to a few years ago that covered this topic, so I might not have the details exactly right, but if I'm remembering correctly there is at least one evolutionary advantage in that there's a virus (part of the herpes family of viruses, I think) that is asymptomatic and for the most part harmless, except when a woman contracts it for the first time while pregnant, in which case it can be pretty devastating to fetal development. But if the woman gets gradually exposed to the virus before becoming pregnant then her immune system learns to deal with it and it won't harm the fetus. Of course that doesn't explain why humans started kissing in the first place, but it could mean that humans who did engage in kissing may have had a significant breeding advantage.

[–] sem@piefed.blahaj.zone 1 points 1 day ago (1 children)

That's awesome. I would love to know what kind of podcast would have that!

[–] Mostly_Gristle@lemmy.world 1 points 1 day ago

I feel like I listened to this one like three or four years ago, but I listen to a lot of podcasts and unfortunately I don't remember which one it was. It might have been Science Vs, or RadioLab, or Sawbones, or This Podcast Will Kill You, or even Box of Oddities. But it also might have been none of those.