I opted for a a different girl once a month. 12 girls a year is a very good average and having sex with the same girl over and over again gets old very fast. My girlfriend knows my nature so she mixes it up and will bring home another girl for me from time to time. She'd rather know who else I'm f*cking then not. Since she's a bartender at a strip club, it's not all that hard for her to pull off over all.
I've strayed from the point, regular sex is only appealing to people without options in my firm opinion. If you've never had a steady boring girlfriend, then the idea of sex with a really hot girl whenever you want it sounds like paradise on earth. The experienced player however, is more about the process of getting girls into bed. I can and have scored ONS regularly so I know that once a month is no big achievement, but, other than the girl I'm with now and again because she knows what I want, I can't stand girlfriends. The whole "dating" thing really turns me the wrong way. I'd much rather spend that time with my boys going out and about socializing and making money. Girlfriends (that's what that whole sex with the same girl thing boils down to by the way, a girlfriend) are like anchors. You have to be considerate of someone else's feelings and include them in your scheduling. No girl is just going to have sex with you whenever you feel like it and not develop feelings for you and want something in return, like quality time and that nonsense. Trust me when I say having sex with individual girls is the way to go, unless your girlfriend is like mine where she is so much about pleasing you that she doesn't consider herself.