First I know it may sound odd looking for a female to play a male, but I've done a few roleplays with women playing males and really enjoyed it. I would consider a male for these ideas as well. Anyway onto the topic.
I've had an idea for a MxM scene where one guy is bi-curious, and finds what he thinks is a trusting guy to help him explore it. Unfortunately for my character, the guy he finds is a real sadist and takes him further and further down the rabbit hole till...... I haven't thought too much about the end because getting there is half the fun :).
This also might work in a patient/therapist setting, I'm thinking the one character goes to see a therapist to help him deal with these feelings becuase he doesn't want to have them anymore. From there the therapist earns his trust, and then begins a more radical treatment.
Ideally I'd like to play the one seeking help, but I do have some ideas as to how to approach the demented therapist. Send me a PM if you're interested..... Thanks.