Sign up for the Slatest to get the most insightful analysis, criticism, and advice out there, delivered to your inbox daily. How to Do It is Slate’s sex advice column. Dear How to Do It,I knew my now-husband had a foot fetish when we began dating. All he does now is rub his penis all over my feet and between my toes, come, and that’s it. If I tell him it’s regular sex first, then he can do what he wants with my feet, he refuses to participate.