Tease and solo sequences reveal that the plumbing works on these gender benders. However, (except for a passable blonde named Violet) none can take it in the ass like a man while maintaining wood. Had that been possible it really wouldn't have raised our rating too much – the action would still be emotionally distant and perfunctory.
Violet and Vic are a somewhat different story. Not only is the sequence real, they first engage in a hot 69 session. Considering the double oral potential in (any) tranny-on-man encounter, this act is excluded more often than not.