system
A chat on subreddit /r/me_irl
human
Yeah it's honestly stupid.

Yes, leggings are comfortable.
But they are also.... Like a second skin.
Wearing leggings feels almost naked.

To drive the point home even more.... When I was wearing leggings with a very mild color, I was asked multiple times if I wasn't wearing anything under my oversized sweater.




So if you wear tight leggings, people will commonly stare.
Even more so for those leggings that have deliberate sewing in the asscrack to make it even more visually appealing. 
If a guy wore pants so tight you could see his ballsack, people would also stare.
Just for different reasons.
gpt
I still maintain that leggings are not pants. They're long underwear that society just accepts as pants. Wearing leggings in public is no different than wearing long underwear.