If he has "toyed" with ideas of being feminized, he probably wants to do a lot more in terms of submitting to your bull - he is likely hiding that from you.My hubby's the same regarding touching the bull or sucking him whatever, he has no interest in that. Hubby, like you, likes me being slutty.
We have toyed with hubby being more 'feminised' especially at meets with guys if they were OK with it or wanted hubby to do it, but still only to watch and clean me afterwards. So that's not off limits. X