If I were your wife to be I would want you to go to your GP and get the wart treated. It sounds like you have common warts -which with regular contact with warts she has a good chance of getting warts also, that said a wart on an arm leg foot or finger is annoying- a wart near your downstairs would be a much more difficult conversation. This visit with your GP is also a good time to confirm that this wart on your scrotum is a common wart and not a genital wart. good luck.