Asexual = no sex drive. In fact, if you wish to google it, I am an "aromantic asexual," in other words I have no sex drive, and no desire to couple with anyone. Yeah, they're separate issues.
start [AVEN - Association des Vétérans des Essais Nucléaires] is the main information site about asexuality, on the web.
As to why I'm here...well, it's simple. I have a penis and scrotum! Mine are statistically larger than average, and the size creates certain issues with regards to the fit of clothing and especially underwear. I just don't physically fit into the stuff that is commonly sold at stores, so I was searching for options.
This site, specifically the "Underwear and appearance" sub section, focuses on such issues...and has opened my eyes to a world of alternatives I did not know existed. Some of those alternatives, like boxer-briefs equipped with a pouch, work significantly better for my needs.
As to why I've stayed...two reasons.
First is, I am now in a position to help others who are having similar problems, and am happy to provide such help when requested. Second, is that the people on this site, by and large, are actually quite nice and have formed a very pleasant community.