I've had 3 girls in a day quite a few times in Thailand and the Philippines. Always from bar-hopping.
I once stayed in bed all day with a girlfriend and we had sex 12 times. But that was many, many, many years ago.
Had a gf last year and we used to have sex 3 times in an afternoon - but now aided by V. I didn't tell her that and she thinks I'm Superman.
She has a 30 year old boyfriend and she says he can only do it once