The strange thing about gym wear

[PSDave]

I wear a T shirt at the gym because I sweat a lot and it absorbs it and I don't have it running down my side.
When it comes to what other guys are wearing I haven't really paid that much attention. I gave up on trying to figure out why guys wear what they do ages ago. I still marvel at guys that wear these knot watch caps pulled down to their eye brows or walk around with hoodies with the hood up. I live in the desert and somehow a watch cap and a hoodie when the temps are approaching 110 degrees makes no sense. For me--I wear as little as possible and live in my speedos when the temps are over the 100 mark. On that same note, why do guys think speedos show too much when they walk around with their pants below their butt cheeks with their underwear on full display.
Also -- if it is OK for a female to wear a sport bra playing tennis (or whatever) why don't they wear regular bras without shirts?
See what I mean -- no figuring out other peoples wardrobe choices!