Really only apposite if you're in a bar situation. I recently asked a couple of boys independently on an App if they did 3sums and when they agreed showed them the other's pic as they asked. On that basis they came to my room. On arrival one went to shower and the other left!! He had never done a 3sum before and decided when confronted by the reality he didn't want to start. His by-line on that App now reads "No 3sum, no group". I like to think I've added to his education, if negatively. He still contacts me for a one-on-one