Sex instead of quantum theory

Two beautiful girlfriends spend a lot of time together, they study, party and go shopping together. They love having fun but even sometimes they have to stay at home and poke their beautiful noses into dusty books. Anyway, it is Friday night and they have to stay at home and do their quantum physics assignment. They work hard but their beautiful heads are busy thinking about clubs, parties and boys. Finally, they give up, phone their mutual friend and beg him for help. They promise heaps of gold in exchange for his help but he demands something spicier. Yes, he helps them but later lures them right on his big dick.