As far as I remember, I was between 12 and 14 years old. It was with one of my sister's swimsuit. I do not remember what were my feelings at that time but I continued to try her swimsuits and running leggings when I was alone at home.
I kept being interested in lycra clothes for many years until I finished my studies and started to work.
At that time I started to buy lycra and spandex clothes including my first catsuit (on ebay)
Today I am fond of all tight clothes lycra, spandex, and also latex