Sad Sucking

The act of sucking body parts of yourself - commonly shoulders, arms, legs and penile/vag areas, to give yourself a hickey. People may do so to fake being in a relationship or, more sadly, to give themselves a sense of love.

Adam: How did you get that hickey there on your cock? You don't have a girlfriend/boyfriend?
Alec: Nah man, I DIYed it.

Adam: You're a Sad Sucker? Man, that's brings me back ...
Alec: We should sad suck together sometime.
Adam: Totally! Yours next Friday. 4 o'clock?

Alec: Sad Sucking bros!