I think you're mistaken about how important sex is to relationships, This varies pretty wildly by individual, but I find it easy to believe that a good portion of the populace would be better off if there were many uncomplicated orgasm sources, rather than requiring a deep committed exclusivity.

That bundled commitment is valuable, and I'm quite happy in it. And, over time, as technology improves and my wife and I age and change, I can easily believe we'll add robots to our marriage. We have some now, but they're mostly there for mechanical assistance, and we don't have much of a deep bond with them.