When two women, of the lesbian variety, are performing the scissoring act on one and other, a male, preferably with a large penis lays flat beneath the two females and has his penis massaged by the two clashing females. This does not effect the male in a stimulating manner, but is more favored for bragging rights.
"I was lying there with a massive erection, when two chicks started scissoring on top of me. I totally was gettin it cut off.... It was awesome."