Mentor is very attractive, straight, and non-homophobic. So non-homophobic, in fact, that last fall, after some friendly badgering and drinking, he let me fellate him while he watched lesbian porn. Much to my delight, Mentor found this arrangement convenient/pleasurable/better than his hand/whatever, and it continued sporadically for a few months.
In January, Mentor got a steady girlfriend and my “services” were not further retained. I completely understood and was happy for them.