I was on swim and dive team when I was young, and Speedos were what I grew up with, however when I started to shave my body for water resistance optimization, I loved the look and feel and was getting more obsessed with bulge and ass, especially on the older team members. Along with tanlines.
GQ in the 80s was very gay and often had the most gorgeous models wearing them playing at the beach. Great article here explaining those gay days.
https://www.gq.com/story/it-all-started-here-the-gay-legacy-of-gq .......and that got me into more than just Speedos, and more into smaller high-volume sexy suits. Water polo Model Jeff Aquilon was the poster boy for showing basket and ass
https://famewatcher.com/wp-content/uploads/2010/09/jeff-aquilon-speedo-vintage-photo.jpg and
I'd shop in New York's Greenwich Village shops that carried the most revealing gear. Trying them on in fitting rooms was a very hot scene. I remember an amazing brand called 'Gazelle for Just Men' that had the thinnest, unlined micro-bikinis and thongs with the sexyiest stretchiest shiny sheen. I'd also order online from N2N, Koala and Prevail Sport. Wearing these tiny suits at gay beaches felt amazing and was like wearing an advertisment for sexy play in the dunes.
Later on in summers out in the Hamptons I started to get into cycling and of course all the spandex gear kit made it a very active hobby sport for me. Most stores sold only boring black, black and black, and I had to order from online shops to get the brightest colors and more provocative designs. It was such a feel to be out and about in skintight gear on my shaved bod showing bulge, ass, legs and more....on and off the bike.
Those are just the beginnings!