Seriously, it's highly probable that the % of gay or bi or curious men among the population is the same everywhere (and quite high for bis and curious I believe). Then it's a cultural thing to accept it or not easily..
As for the Brits, well guys, that's the reputation you have across continental Europe, not only in France
.. I think that comes from this image of Englishmen happy together in boarding schools, in clubs, doing sports, etc... away from their wives or girls in general
You may like to say the same about the French, but I don't think this vision is shared by other Europeans
this is just typical French bashing from England !
Anyway since we are on a gay/bi site, all this is said as a compliment of course. I'm always happy to meet nice and fit men when I'm in London