ground wire

During sex your partner put a finger in your butt, to help you achieve orgasm.

It can be as deep as a prostate massage, or just circling close to the entrance.

The origin might be from the Brazilian fio-terra.

Male 1: How was the date with Female?
Male 2: It was great. When I was about to come she ground wire me. I came like a fountain.

hetero ground wire

a woman in a menage a trois involving homophobic men

Jill offered to be Bill's hetero ground wire in a menage a trois involving Bill's coworker Stan.

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