It's awesome that other guys are like this too. It's cool that you wrote about it. Since really young, I was just really sensitive to and in tune with how different clothes felt on my skin, & getting pleasurable sensations from it even before I was old enough to start experiencing true arousal. Speedos were the first thing that really got to me, and then leggings and other spandex. I noticed that too, how some things were silkier & stretchier & just felt more pleasurable. I wasn't around in the 80's & I wish I'd gotten to experience that. I don't own any vintage stuff but some guys I've met had some & I have to admit it feels really horny. For sure, the serious swimming speedos for swim team like Speedo Endurance and Tyr Durafast that are polyester blends don't feel as silky & stretchy & horny as nylon lycra spandex speedos. They last almost forever, but they're rougher material & not as stretchy & good feeling. Being a runner too, it's the same with running shorts. The new polyester blend shorts don't make my cock stand up like the all nylon soffe silkies.