naked water-skiing
naked water-skiing is when you strip down, get on your board, and ride the water like a maniac, some guys get so worked up they think the lake is giving them a free massage.
I took my clothes off and skied like I was on fire. My hard-on was like a flamingo in the sky.
I skied so fast I lost my shirt. My friends said I looked like a naked superhero.
I skied with no clothes on and my hard-on was so big it looked like a whole other person.