If he has a lower sex drive than you then there really is no cure for that. Have you tried little sneak attacks during different times to get him hard? If he has no problem getting hard but still doesn't want to have sex then you aren't hitting his
sweet spot. There is something that just
does it for him, find that and you will be golden. (Unless it's another woman
)
No wood at all could be a sign of medical problems; take him to the doctor.