When a man dons a strap-on posteriorly and proceeds to engage in vaginal or anal intercourse with two women at the same time with a back and forth movement. Variations include a woman in the middle, with or without strap-on, and participants of the befitting gender. Other conceivable combinations include any three trunks and a couple holes.
As Stuart trained in on the correct angles, Agnes and Phyllis found the parallel parking quite enjoyable.
by Cabot November 17, 2006