because they have a sense of rightness
They are female regardless of their body
they use their own moral compass
There's not a right or wrong answer
These people are very confused, and need to seek counselling
I could easily make the assumption that many of these guys had no "real" male figure around growing up, the only people with any balls were female...therefore their role model for survival is female.
Obviously only a small percentage of fatherless boys grow up this confused.
The probability of needing to pay for a drug relationship also presents itself....let's just say it's easier to find a man willing to pay for a screw than a woman.