A Body At Rust

I've been married to a wonderful woman for two years. We have a 2-year-old child. Unfortunately, we stopped having sex when she got pregnant and haven't started again since. She loves me, but she just doesn't want sex like she used to. (And no, I'm not some sexist dude leaving all the baby care to her.) How can we jump-start our sex life?

--Famished

"Being and Nothingness" is 722 pages of stylishly depressing existentialism by Jean-Paul Sartre; ideally, it does not also describe what goes on...