A Lesbian sex act where two partners interlock their spread legs and grind their vulvae together to stimulate each other's clitoris to orgasm. Also called tribadism and scissoring the practice has many colloquialisms.
A sexual act performed by a man and either another man or woman. The man sperms on the back of the other person and then belly slides across and over the person leaving a slug-like trail on the back of the victim.