When I was 17, I was in an accident, broke both my wrists and right arm. Since my hands couldn't get wet my mother had to bath me. The first few days worked out ok, but one day I started getting an erection.
I tried to hide it, and then my mother told me that it's normal and asked me if I masturbated. I told her couldn't with the wrapped hands. She told me to close my eyes and that she would help me out until I have recovered. She gently jacked me off every second night for two weeks-we never talked about it since.