When I was looking at my cousins who I hadn't seen in a while while they were changing, they invited me to take a bath together and showed me their grown-up bodies and washed each other. When they noticed that I had an erection, they pretended to wash my dick and grabbed it. When I was a kid, it was just a case of playing doctor and messing around, but I'm an adult now. They don't know what's going on in their wet slits!