Exactly as chicks commonly blame hormonal issues to explain away their general irrational and anti-socialbehaviour this can be used by guys to defend their own outrageousness actions.
My girlfriend: Hey, I just caught you checking out that chick on Bay Watch. What's that about?
Me: Uh-huh! S'not my fault - around the full moon I get a hornomal imbalance
My girlfriend: I don't care how much your daddy is paying me, I'm outta here.
The way someone feels when they look at someone in a sexual way but may not be able to do sexual acts or want to date so they just stay on the other line sending very inappropriate videos and images.