A colleague of mine was regaling us with a tale of her 3-year-old son, L. He's quite the character, and stories about his antics remind me of stories my mom used to tell about my cousin when he was a kid.
L and one of the neighbour kids were playing in the basement, when the neighbour kid came upstairs crying.
Aw, what's wrong? Did something happen?
L hit me in the eye with his penis!
...yeah, me laughing my balls off just re-typing that has definitely tipped the scales towards the "this is one of the reasons to have kids" side of the ledger.