1 definition by FlyinMonki82
Sex that lasts over an hour, with continued intent; if only an hour and a half or so, partners may only be distracted during sex. During 'marathon sex,' as opposed to marathons, small breaks are sometimes taken, akin to stretches during exercise, which is part of what the 'marathon' is... exercise, for both partners, in every case, though! For it to last so long, mutual exercising, and most especially pleasure, throughout the entire event, are both prime requisites.
When we're going to have more than a few hours alone, it's always nice to make sure a good bit of marathon sex is part of that time.
by FlyinMonki82 November 13, 2015