i was dissuaded from one because it wasn't 12 months after the birth of my last child.
my DH wishes to have one now, before the birth of our 3rd, and he is 30.
BUT, he's been wanting to have one for a while now and i do think, ultimately, it's a person's choice.
i cannot use hormonal contraception, so basically, after our 3rd is born, it will be no sex until the sterilisation is shown to work, because we both feel that strongly about not having any more children and abortion is not for me.
i don't think 'unwilling partner' should factor into it, FWIW, because i know i'd hate to see the day when a man could veto his wife's right to do what she wishes with her body because he doesn't agree with it.
it's unfortunate your spouse did not receive counselling before his procedure, though.