Why excites using Spandex or Lycra?

I don't remember well when my obsession or fetish began For Lycra's clothes. I think it was something that caught my attention, see some cyclist With those adjusted and brilliant lycras as a second skin, the bulge defined with a semi -erection, Maybe I have struck my attention or curiosity, but I am not sure until today. I only know that the day I put on the first lycra I had an instant erection. It was delicious to see my pounding gaps low tight garment. It makes me behave crazy, exhibitionist. It excites me a lot. I don't know if the same thing happens to someone, although I see I am not the only one in this place that feels something like that. And you?