Sex twins

Two people who have been having sex over a long period of time and are starting to dress and look alike. Is most noticable in same sex couples and people wearing sweaters.

How was Berlin?
Girl, it was amazing. I saw a couple on the U-Bahn and couldn't decide if they were sex twins or siblings.

by Memepaasmal March 8, 2019

sex twins

Two women who are hired by a father and son to dress alike and provide sexual favors.

They walked into the bar with sex twins on their arms.

by Army of skanks July 22, 2014