Dig a mass grave type trench. Line 'em up in classic execution position - kneeling, blindfolded, with hands tied behind their backs. Positioned a couple steps back from the trench, so fellas have room to come into frame and start face fucking them. When the time comes, a short switch to anal and then donkey punch 'em into the trench, and cum on them as they play dead.
Actually, I love and respect women, I don't know where my love of Gag Factor and ideas like this come from.
-Chuck, Vegetarian fanboy