Joel_Miller said:
That's why pregnancy play is also a good way to get a femboy going. Even if not possible, whispering near his ear that he going to fill him up with so much cum he's going to end up being pregnant, all while the loud noises of his hips slamming against his needy bussy, almost not letting the femboy to hear what's he saying... Surely would be a turn on, for both parties involved.
Why only whisper in his ear? Yell at him to get pregnant, get mad at him for not being able to get pregnant, punish him for being capable of getting pregnant. Tell him you'll keep trying until he does get pregnant, despite knowing he'll never get pregnant