Never? It means they are roommates with the same last name.
Naturally a follow up question would be; How does he respond when his (wife) touches him?
He could just as easily be thinking; What does it mean when a husband's wife never touches him? Most men want to feel desired.
It's not uncommon if one person (always) has to initiate touching or whatever to eventually stop once they realize it's always (them) that gets things rolling. Some people start off by playing a "wait and see" game. If I don't do it how long will it be before she or he does it? The longer one goes without something they get used to not having it.
It's easier to maintain a fire than it is to reignite a spark!