A sex act in which a man attaches a strap-on to his backside, facing rearward. Two women then situate themselves in front of and behind the man, one receiving his penis, the other being thrust into by the strap-on during his back stroke. This technique maximizes the man's time and energy while pleasing two ladies simultaneously.
Your mom and sister only had a few minutes while your dad was out, so a pump trolley was our only option.
by Seacow January 10, 2014