What does deodorant, soap, and contraceptives have in common?

As Rick Santorum:

Santorum compared contraception to deodorant and soap when making a point about why he believes birth control should not be covered by health insurers.

"Let's mandate that every insurance policy covers toothpaste. Deodorant. That might be a good idea, right? Have everyone cover deodorant, right? Soap. I mean, where do you stop?"