OK, I will give McAvoy credit on this. A love scene shot for a film is HUGELY different than a love scene in real life. There are not too many instances where you are about to get it on and you look up to see a crew full of union guys standing around. (OK, it happens sometimes at my place, but thats another story.)
I remember hearing a story about a love scene with George C Scott where as he got into bed with the actress before filming he said "Madame, I apologize if I get an erection and I apologize if I don't."
Still it does seem strange that there is such attention being brought to the love scenes for this movie. Are they that lurid, or is this just a cheap tactic to get people to watch an otherwise drab and boring film?