I think one of Steersman's posts I wanted to respond to is now in AAH, but I was curious to know if discovering a way to reverse a vasectomy easily and rapidly would make men with a (not yet reversed) vasectomy male? If I recall, the issue was the time needed to reverse it.
In Steersman-speak, a person contemplating a vasectomy reversal would have to be 'One who was previously male and might become male once again'