One time I was taking a shower and I was washing my hair and rubbing the shampoo into my head, and I kept rubbing my head, and the warm water running down my scalp, and the head massage, it was all sort of somehow sexually arousing me, and I imagined myself to be a large penis, with my head being the head of that large penis. And so I kept rubbing my large penis head and it was all very arousing and exciting for a while, but maybe a couple minutes into it it kind of got weird so I stopped