I remember having 2 girls on the go when I was about 20... It was pretty funny. They both sounded similar over the phone, so when they rang I had to be careful...
At one stage, one of the girls asked me, "are we going out, or just bonking?". Tough questions! haha.
Jeepers, it was a balancing act at weekends! At least I had surfing and windsurfing to get away from it all.
The blonde one eventually found out, on the grape vine I guess... She came over after finding out, to personally tell me I was dumped! But she was also still happy to have a good buy spanking! Sad thing was that she was probably the keeper out of the two.
But at the end of the day, it's not fair for anyone! Funny days, no serious harm done at that young age!!