Behavior I didn’t recognize

This happened awhile ago, but I still think about it to this day. My current boyfriend and I have been dating for awhile now, but on the 4th date we met at a park, and we sat in the back seat of his truck and talked. And it eventually led to us having sex. He at least asked me to be his girlfriend first before that happened 😂 I had never felt that much sexual attraction and frustration around a guy before. Before this, I only slept with 2 guys I had long term relationships with, and never did anything in a parked car. My own best friend asked me what he did to me because I had never behaved in this way before, but I have zero regrets 😂🤣