SUBREDDIT: r/relationships
TITLE: Me [20F] with my boyfriend [20M] new relationship, certain sexual
POST: When I was four I was sexually abused by a man who was much older than me. It wasn't severely traumatic, he basically had me jerk him off, I was four I had no idea what I was doing. 

Things are moving pretty fast with my boyfriend, which I'm happy about, except I'm always reminded of being molested at that age when I touch his dick when he is wearing clothing or if I am only touching him with my hand while we're naked. I'm fine with oral sex (hand+mouth) but I'm reminded of being molested if I'm only touching him with my hand. It makes the whole experience less enjoyable for me. 

It's taken me 3 relationships to get to the point where penises don't scare me or immediately remind me of the event. I've been seeing him for two weeks now which I know is really quick to start having sex but I don't know if I'm ready or he is ready to hear about that kind of previous trauma. 

Should I bring this up yet or should I wait. When I do bring it up how should I phrase it so I dont freak him out?
TL;DR: 
Mild CSA survivor needs advice on how to bring up topic to new boyfriend. Certain sexual acts immediately remind me of the event and make me uncomfortable.