4 year olds? Do you mean 14 year olds? 4 year olds don't get their period, so they cannot have a baby. 4 year old bodies haven't produced any of the hormones to start puberty...not till about 7 y/o. then puberty comes a few years later. 4 year olds do, unfortunately, are victims of sexual abuse. they can get STIs, but cannot produce a baby. I would like to see a study where 4 year olds have ovulated and produced an embryo.

However, I think you make really great points about adolescent sexuality in general. I just saw this movie, called "Thirteen" it's really disturbing, but excellent. Anyone interested in adolescent sexuality, substance abuse should see it. Especially if you're an educator.