That's diabolical. But what a shame that future medicine gets rid of headaches so easily. If the wife is unexpectedly unavailable, like she's broken all her bones in a shuttle accident or has sehlat rabies can the husband use a substitute? Since it's not like anyone is going to challenge him over the diseased wife. And what happens if your wife has something terrible happen but doesn't die but can never mate with you again, do they divorce over that? Are there comfort Vulcans who medicinally are supplied when needed? Or do they sentence the ones who have gone bad (like that dude in ENT who was a smuggler) to not-the-death-sentence but oh fight this guy his wife can't mate?