Experienced man, to whom young girlfriends asked for sex, rightly distributed their forces. While he fucks one, the other excites her clit with a toy. Everyone is in business and satisfied. If you change partners, then long over her not have to pant - can quickly cum or jump on top herself. And the girls do not get bored, all the time caressing not only themselves, but also their partner.
If your girlfriend is a bitch, then consider that variety is guaranteed for you. Look - this cutie doesn't mind getting laid by a stranger for money if her boyfriend allows it. What I find most endearing about this situation is that she doesn't cheat on him, but lets him decide the matter himself. That turns her on more than the sex. When he took the money and counted it, I got a hard-on. Deciding who can fuck your girlfriend and who can't is adrenaline and high. Don't tell me he fell for the 20 scoops of ice cream she promised him for that money. There's more to it than that. )
It's nice to watch father and daughter exchanging mutual caresses. After that, the daughter is forever working with her daddy's company.