I always read that column. I usually find it slightly uncomfortable reading - mainly because I'm in a sexless marriage - but I do think it can also be "challenging", and that's not a euphemism. Sometimes I think the couples have genuinely found what works for them, and well done for stepping outside what society views as normal, and other times it's clear there's a tension in the relationship which will soon become intolerable. The problem is that, for most people (as far as I can tell), sex is bound up inextricably with shame. Some of the people in this column seem to have thrown off shame.
I also like this column's vanilla cousin, "Blind Date". It's lovely when the couples have a spark and also, in a Schadenfreude-ery kind of way, great when they don't. A while back there was a very plain man (though I'm sure he was a great bloke) who they matched with a very handsome woman - and the results were what you'd expect. To be honest, I thought whoever matched them was being a bit cruel. But I still read it seven times.