They are all fine with me, as I actually have no respect or concern for marrige anyway. Although, Couple E is my favorite
Excellent view of marrige there, Dr. Cynic! My favorite, pornologically, would be couple A - I love the hetero porn with the big bamboo. E would be fine, but there's nothing there to really stretch the actress, if you know what I mean.
Oh, and by the way, there's no option for Opebo, who obviously thinks all marriage is immoral.
Well, not 'immoral', Bell Pepper, but certainly stupid, misguided, and contrary to the impulses of most people. Not to make any claim of objective morality - just to say that monogamy is much more likely to be social imposed than a normal evolved sexuality.