Robber shoots himself in the nuts.

[Alex]

Originally Posted by Ghoulish Delight

Unless you've been snipped (but even that's got a chance of being reversible).

Bingo. Yes, the chance is not zero since in this modern technological age there is no such thing as being alive and completely removed from the gene pool (in a decade or so it would be possible to clone me and have that copy reproduce sexually or use my stem cells to create sperm cells that could be combined with an ovum) but I'm about as close to zero as it is possible to get.