Atwater (on the left) and Mercer are active duty Marine buddies of Mason & McKinley, and after hearing what a bunch of the guys on base had done in Vegas, they decided 10 give it a shot, too.
Of course, mercer's married, but he didn't tell his wife about his Vegas plans.
Atwater, with his glasses and sort of nerdy look, has a suprise of his own, too... a hard body and a very nice dick under his clothes as well.
Straight active duty marines... jerking off side by side and giving each other a long french kiss, too.