system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why is nudity such a big deal?

I never understand how nudity became such a big deal that seems to impact virtually every culture. In Europe there is a more relaxed attitude about it. And in some tribal cultures I guess nudity is OK. So why in the modern cultures is nudity such a taboo? You can go to jail for being naked in public - and it all just seems normal. I don't understand this. Most ethics seem to agree this is how it "should be" from atheist or theist, from communist to capitalist - there does not seem to be any real **movement to decriminalize nudity**. Will humans ever move beyond this? We see ourself nude every day. And we see our spouse - or other people in locker rooms. It seems like such a strange and narrow cultural regulation. It seems irrational but fixed.
gpt
When some female animals are in heat, they undertake actions known as presenting, signaling readiness for intercourse, which in some species triggers hormonal cascades in males, basically turning them into horny fuckbunnies.  Human females are fecund year round, and human males get turned on by all manner of displays, some instinctual, some conditioned.  There are all kinds of maladaptive behaviors men undertake when they posit that a female in their vicinity is signaling sexual readiness.  Some joke that men can think with only one head at a time.  And fathers of many human females will be damned if they let her get nude before that high school dropout junkie who likes to sweet talk her.  In most modern societies, being nude before a male of the species typically IS a signal of readiness for intercourse and vice versa.