Why you ignore it
You say, “Oh, he’s just a guy! They’re animals! They’re all like that!” UM…that’s not just being an “animal.” That’s almost sexual molestation. You should be able to sleep in peace. A guy who plans on being with you for a long time can let a few nights without sex go by because he knows there will be plenty of time for that in the future. But a guy who sees an expiration date on this relationship wants to get in all the free play he can, before he’s out hunting at bars again.