Originally Posted by Crazysam
Could it be because you ar standing up?
Both come into effect. It's usually harder for guys to masturbate standing up, and even when I'm sitting down in the shower (mine's big enough to sit in), it's hard for me to come to an orgasm. So really, it's sorta both.
I also agree with the fact that a shower isn't the most erotic place and I wouldn't want to jack in there anyway