Today, I went to a baseball game with my girlfriend's dad. I got a boner when they sang the anthem, because that's what I sing in my head when having sex with his daughter so I last longer. FML
Classical conditioning at it's finest... When I was in the US Army in the 90's, I beat off so much in the shower that I still get a hardon ever time it rains.
It isn't that the girlfriend's father enjoyed listening to the song, it's the fact that OP and said father were at a baseball game. The anthem was unavoidable.