Well, if I didn’t have the genitals that the person I was dating expected, I think I’d try to really establish a connection before letting it come up. (I’m sure there are some others who might bring it up early, just to get it out of the way, but for a relationship that hasn’t gotten to that level I think bringing up genitals at all would kick in the TMI factor.)
What I wonder is to which is better, no penis, vs. Franken penis. Clearly this individual has had a lot of time to ponder on that, and one hopes that the decision will work for him as an individual, and within the context of his current relationship.