One of the more popular places to pop a boner is while asleep on the beach (likely with your face covered, for sun protection and anonymity).

Don’t believe us, check here, here, here, here, here, and here.

One of the dangers of falling asleep outside, especially when wearing almost no clothing, is that when you get a boner while sleeping you can become a victim of photos like this.  The interesting thing is that, other than the guy beside him, no one else at the pool seems to have noticed his pants tent.