Don't you think you just slightly overdid it with all the warnings? The rules only require that titles are SFW, and that NSFW content is marked as such. I understand you're an American and thus afraid of sex, but this is probably the least harmful scene in the entire game as far as kids are concerned. =P
I'm personally not too enthusiastic about the "sex" scenes in the God of War games. They're all rated 18+ anyway, so the developers could do something substantially more interesting, and the girls always look pretty horrible.