I'm guilty of the guy version of this (compression shorts and muscle shirts) unless I'm going out on the town or something. Am actually pleasantly surprised that I'm still a medium in Adidas, large in Nike & UA, and medium in more pricey brands (eg 2XU) when I can afford them.  If you have a nice body nobody (besides fatfucks LOL) really gives a shit about this for running your basic daily errands, at least where I live, unless your junk is hanging out or something. In fact I've found a lot of people appreciate it.. But as I posted above if I shopped at Whalemart I'd be a XXXXXS.