Am I the only one that becomes a bastard while I'm On? I have been living with my g/f for 4 years, and everytime I am on, I think about cheating on her. She tells me all the time, that I change everytime I'm On (as far as wanting to have sex with other girls). That's the only thing that she hates when I start my cycles, otherwise she's got no issues with it. I feel like a complete ass because I love my g/f and I'm goingto marry her, but my hormones go through the roof and I just want to have sex with other chicks.