I don't see too many of these unless they r newly divorced and on the prowl.
However, as a gal I don't see a problem not wearing a sports bra under a sports top since they have a build in, although mild support shelf. It only becomes embarrassing for me/distracting to me when i get chilled so to speak. I always wear a sports bra when running

.
Re the pants, it's hard to find tights that lay right in the crotch. But under armor has some nice ones now.
Now I also add that if I was a wear a
potato sack, some guys will still look. Can't seem to stay focused.