Both of them are good students so they wouldn't skip class without a valid reason, but when the offer is a foursome with two horny jocks, who could say no? Listening to their teacher is interesting, but it wouldn't feel as good as taking turns sucking three big cocks and getting their ass pounded so hard they know anyone at school could hear their moans. Sure, the downside of fucking in the locker room is that they can get caught, but that would only make their dicks harder. If anyone wants to watch, they can. They'll be fucking each other's brains out either way.