Do early sexual experiences with peers negatively effect children?

Hard question to google (if it phrases it as sex abuse experiences and the like the result is going to be predictably negative, but that's not the question here,) but some results answering the specific question include:

http://www.ncbi.nlm.nih.gov/pubmed/2818170

"It was concluded that adult sexual adjustment is not negatively or positively influenced by typical early childhood sexual experiences among similar-aged siblings."

Though specificly studying the effect of sibling-incest, one might say if that didn't screw you up...

Contrary to what the knee-jerk types think, I don't wanna lower the age of consent younger adults can have sex with anyone over the aoc, but only so they can have legalized normative sexual experiences with their own age range (favor within 2 years representing who you're likely hanging out around with in school.) If it's legal, health and educational services can be made available and it doesn't have to be kept secret. Nothing good happens in the dark. Instead of doing what doesn't work for drugs as with prohibition, make normal adolescent sexual experiences legal.

Gonna get a lot more benefit "being cool about it" with adolescent-aged kids legalizing and helping them figure sexuality out than you get making it illegal.

After going to war, sex messes people up the most and easiest. Making sex when going through puberty desiring sex illegal and taboo so it's happening in secret is a great way to ensure the future of psychiatric services because most people are screwed up, but not a very ethical model.