Are we talking full-blown 80's spandex or Under Armour compression stuff?
We're talking UnderArmour, Nike, 2XU and other major sports apparel manufacturers that are jumping into the whole "compression" realm of performance clothing which serves an absolute purpose and function in not only keeping you warm but also in helping endurance, performance and even recovery.
* The reduction of lactic acid build-up and increasing oxygen delivery through enhanced circulation
* Focusing muscle power and dramatically reducing muscle vibration
* Drawing moisture away from the skin using moisture management wicking
* Optimising body temperature in warm or cool conditions
* Discouraging growth of bacteria and preventing odour through antibacterial and antimicrobial treatments and providing sun safety with SPF 50+ protection.
* Increased blood flow, increased delivery of oxygen to the muscles and accelerated recovery
Whereas the spandex of the 80's is just colorful lightweight fabric entirely intended for fashion and trendy looks.
I am absolutely certain without a doubt that my wearing cycling shorts on my long rides gives me a strong advantage in performance over my old grunge-style heavy mountain biking shorts that I used to wear. Not only does it feel lighter, quicker and "cleaner"...I just seem to have more power, greater endurance and overall performance...I think it has a lot to do with bloodflow and other stuff. You can read a lot about the science involved. I also know runners who will continue to wear full-length "tights" after their run and even to bed for recovery purposes. (they shower and put on a fresh pair).
At the same time....and let's be honest here...there is a certain degree of sex-appeal to this kind of skin-tight garment. Had those cardio-bunnies of the 80's been wearing sweatpants and baggy shirts, none of us would have been drooling or going to the gym as often.
I myself made the transition from baggy riding shorts to lycra and came home to find my wife and her trainer getting all nutty over checking-out me out. That blew my mind, the notion that woman might look at me like us men look at woman....and so I've strived to lose more weight, get in better shape and earn the right to "pull it off". It's enpowering and fun to be able to think you're eye-candy for woman, I just hate when they smack my ass, put dollar bills in my shorts and tell me to dance!
What I think it really comes down to is that there are guys that wear the stuff because we are physically active, use it for performance and we don't mind a bit of attention. The stuff we wear is clearly men's apparel, made for men, cut for me and usually black with stylish & sporty logo's, designs and patterns. We wear it when doing our sports and maybe for a quick run to the bank or lunch on the way home...BUT it's done tastefully & proper. The big "tell" is the crotch; it's either covered with a long shirt or there's some padding that reduces "definition" to the point where it's a non-issue. We look in the mirror before leaving the home and we're not presenting an afront to some people's delicate nature.
....and then there's the perverts, guys who don't really exercise and just get-off on the association of wearing something that leans towards the feminine side. Posuers. Some of their stuff is a bit 80's and some of it may even be ordered from the woman's section of the catalog (or from their mom's closet). The big "tell" is that they are obsessed with the crotch area and generally don't cover the crotch...they like to fly a tent in loose fabric. They love to post pics and ask "is this alright"...even though they know the dealio. Most these guys are pretty wimpy, lean and slight in nature...I might even go so far to psychologically profile these guys as petty crossdressers...but at least they aren't molesting kids or beating their wives.
Oh my, I've tangented yet again