While I thought the hookup was going to be mutual masturbation, the gay ended up giving me oral sex.  While he did NOT penetrate my anus, his penis was in my crotch area and may have touched near the opening (although I was not anally penetrated).  The masturbation involved rubbing penis together.  I guess since his penis was near my opening and he ended up sucking me, I'm just feeling nervous about the encounter.  Recently I've started dating someone else, although we're not yet exclusive, and I'm wondering if I've done anything to put him at risk from this encounter if he and I hook up in the near future.