9 Most Embarrassing Questions Answered By Science

You'll be unsurprised to learn that all a penis really wants to do is stand to attention.This usually happens multiple times a night, but you only notice the one you wake up with. Combine this with the fact that most people wake up needing to pee, and that the erection will usually go down in the time it takes for you to go to the bathroom, and you'd be forgiven for thinking it's just 'cos you're all full of wee.