My wife has had a partial hysterectomy. I've had a vasectomy. The odds of an unwanted pregnancy are low enough that we take the risk in our committed relationship to not use protection.
I'm sorry but I do trust her 100%. I'm pretty sure she trusts me. We don't use any protection but I feel anyone who doesn't feel they are in that situation should always strive to have the resources for themselves. The male condom seems to be the easiest, most effective, economic option for all.
~Two friends, one soul inspired~ anonymous