I don't remember much of anything up to the age of 14, so there's a good start.
Then at 14, my first solid memories are of dating a woman 4 years my senior (18), out of desperation for positive emotional attention. Thankfully no sex happened.
Flash forward a few years, I dated a girl my age whose mother treated me like I was a potential rapist. Didn't last long.
Another year or so, I'm 17 and coming out to myself, and in college, I date a 23 year old woman for a week and she lies to me about damn near everything about her. Doesn't last long.