I had a friend like this when I first moved into a shard dorm. i was in the closet and afraid of being discovered as a cock sucker. We met when I missed my bus in the rain one day and he gave me a lift. He sensed I was gay and soon we were meeting regularly. Sometimes my urge to suck cock became too strong to resist so I would contact him and sometimes he was just feeling horny and contact me. We both knew what satisfied the other so when we met I would suck his cock and swallow his cum then we would both be satisfied. It was never more than a sexual relationship which suited us both.