Pre-K boyfriends

Duh, kids say the darndest things, but it's always eye-opening to get stories from other teachers and what they overhear. So, from another teacher:

Kindergartener 1: I had sex with my pre-k boyfriend!

Kindergartener 2: Me too!

Kindergartener 3: I had sex with my brother!

everyone: ?!

Someone needs birds and bees (or turtles, what what).