I'll second what Josh said... having your clit sucked, especially if you're on T and it's grown, is incredible. Also, what Autumn said is good... especially if you can get your partner to do the same. I had a girlfriend who, because she was mtf and pre-op, was uncomfortable with sex, but would do just about everything but. She'd talk to me as if I was fully male, talk about my cock etc, and it turned me on to no end. Hopefully it'll work for you.
SD