Let's talk about sex.

In June, I had to tell TZ about sex.

It started with a question about erections. In the hallway at the YMCA. There we were after an hour in the pool, carefree and ready to head home for dinner, when

"Why does that happen?"

Oh, dear. Here? Now? Mind spinning. What to say? Where to start?

So I give a little physiology lesson involving hormones and blood vessels, hoping that will be enough, but of course it isn't. But why does it happen? he persists. So I have to talk about what happens when you get a little older, about girls and boys and bodies changing, and sometimes it just happens, um, when, um...I keep hitting the pause button when people walk by (which happens frequently a the Y), and TZ keeps asking, "Why are you stopping?"