Both parties (this can be a male and a female or two males) are unclothed – barring the shoes still worn by one of/the male.

The female or 2nd male has his head buried in the corner of sofa, the male/1st male puts his shoed foot on the neck of this party and enters “through the back door”, whilst the “trapped” party screams, with pain.

A jack off buddy (from 'cum' /'come', meaning 'semen', and 'companion'); a friend that you get together with for sessions of solo or mutual masturbation
Variant of: cumpanion (from 'companion' & 'cum'); jack off buddy & wank bud & JO buddy
Similar to: fuck buddy