Boys have penises

When my little Alec was about 3, he had started to notice some differences between himself and my little girl Becka. It was probably one of the funniest experiences I can remember, as I tied to explain to him the difference between boys and girls.

He didn't seem to understand all the big words I used, and I finally I gave in and used the simplest explanation I could, "Boys have penis's and girl have vagina's."