What's the definition of "girlfriends"? Someone you've dated for longer than a set period of time or someone you've shagged? Please lay out the ground rules, cuz I was dating 8 girls (3-4 at a time) before settling down with just one. I wouldn't consider those other "girlfriends".
If you mean long-term dating: FIVE
Most were about 2 years, though one was 4 months and the current is 8 years. If you're counting more liberally, then add another 20 or so to the body (booty?) count.
