My husband is Optimus Primal here in the forums. He's not 100%, but has found himself voluntarily becoming more pure primal as he goes -- losing his sweet tooth, etc. I suspect we'll both be a lot more hardcore once I can get fully on board post-baby.
It's certainly nice having his help with the primal cooking. And he makes us big salads every night for the next day... shops carefully when he's taking care of that... it's wonderful!