I've been into tickling for as long as I remember, but there was one incident when I was about 3 or 4 that had the biggest effect on me. I lived in a duplex that my aunt owned, and it wasn't uncommon for my cousins to babysit me. One of my cousins had a foreign exchange student stay with her for a semester, and my cousin would tickle her all the time. Tickle fights were pretty common when I was around, but one day my cousin decided to pin down the FES on the couch and told me to tickle her feet. Being the good kid I was, I did what I was told and tickled the shit out of her. At the time I didn't understand why my cock was so hard, but I enjoyed every moment of it, especially when she started to beg in her native language. It's probably the reason why I love foreign women and accents.