If you think this British story is more fiction than fact perhaps you live in a more rural area or don't see the various shades.
Even colleagues of mine here all complain about their wives who have them begging for sex not even a year after marriage and/or they complain about their surburban stay at home wives who gaggle together and take for granted their lives away from the workforce and don't think they need to do anything for their dawn to dusk working husbands.
And this is not the rich mind you. This is just the common suburbs where wives get together and talk about how sex, oral and otherwise is just not really necessary.
True story.
Well I admit I can't say much about what goes on in Britain....
Maybe british guys are just really bad at it? Lord knows I've dealt with my shares of shades over my lifetime in relationships.. but never had one where sex was off the table... Usually we were still having pleanty of that even after we had rationally concluded the relationship really wasn't what either of us were looking for.