A couple of my current plates are aware that a vasectomy is coming. One of them is a nurse and will be my ride to/from the doctor's office, so she kinda has to know, and fully supports it. The other one who knows ended up taking Plan B and feeling pretty sick and crampy, so she's happy to hear it won't be a problem anymore. The other three (or four? How does one count plates? Do I only count a plate-in-training as a saucer, or something?) don't have any idea.
With future plates, I intend to keep my vasectomy a closely guarded secret.
My main reason is that I feel about 90% of females love the risk of maybe getting pregnant by a strong, aggressive man who holds them down and fucks them. It's a whole mental/emotional thing. I can still give them that, as long as they've got no idea I have been cut. I feel I would lose SMV with most females if they knew.
My other reason is more of a sociological experiment. I want to see how long it takes before a girl tells me she's pregnant and I'm the father. I'm going on Maury SO hard.