ewood: you are absolutely right. Being married does not necessarily means sharing the warmth of human contact. In the Woody Allen movie "Sleeper", he wakes up 200 years in the future after being frozen for that long. When a woman asks him how could he go for 200 years without sex, he responds "it's actually 204 years, if you count my marriage". Funny, and sad at the same time.
I suppose Wally's marital history (as HelmeetElGato alleges Wally has) and his claim of never having tried "the warmth of human contact" aren't necessarily contradictory claims... I know for a fact that you can get married despite a lack of warm human contact. I don't recommend it, of course. Wally is ahead of the curve as ever.