I mean society seems to think so? Frankly also I just typically get uncomfortable with people peeking down at my crotch. I don't generally wear tight pants for that reason because I'm not looking for that kind of attention.
It's just that the focus goes a lot more to nipples. If you wear a tight shirt with external secondaries you better wear a bra or be prepared to get started on or even get shit from people.
Yeah, we live in a weird world based around absurd prudish values. I do believe it's increasingly less frowned upon in some European countries, especially Denmark in my experience.
Well, there are men's ballet leggings and whatever folks wear to your local renaissance festival, but I see your point. Neither really has the fit or look of women's athletic gear or cozy/comfy stuff.