I feel much safer on the bike. Better acceleration to get me out of trouble. Plus I'm was in a car accident (as a passenger) and was thrown clear of the wreck Because I wasn't wearing a seatbelt. Had I been wearing a seatbelt, I would have been crushed.

I honestly believe that if you really want a bike, she should be able to accept that (Especially seeing as you have been getting by with one car already.) Marriage is about accepting the other person - and their little bits of craziness that sometimes just drive you nuts. You just have to be willing to bend on other issues if ou want her to bend on this one ...