I tried to edit my post to include the following, but it failed to send.
I think it's safe to say that the female figure is more artistically attractive than the male one; males are infamous for being hairy, lewd and rough (which I'm sure some may find attractive). On the other end of the spectrum women are sensual, beautiful and graceful; it becomes apparent why both men and women are attracted to females. I think women tend to rather be romantically involved with men because they can seem more stable, reliable, and dependable. They'd rather be with someone they can rely on as opposed to being with a female -- too much estrogen and not good relationship material (even if they do find them more attractive). I think a reason why my life partner loves me the way they do is because I exhibit strengths from both sexes and lack the silly, trivialities thet tend to dominate one sex or the other.
I think women would rather admire the feminine form from afar and still remain 'straight'. Most gay men I've known aren't even entirely gay, proving that feminine beauty can reach out to what a gay man finds attractive or just the fact the everyone is a bit bi-sexual.
I also agree with dadudemon in that it's easier for a woman to be lesbian than it is for a man to be gay. I believe this is testament to the fact the women are the 'sexier' gender; two gay men isn't attractive, half the time it tends to be downright disguisting. It's easier to find a beautiful woman than it is a beautiful man (although I know several extremely aesthetically pleasing men and it's not hard if you just look hard enough).
I feel like I'm rambling at this point, so to answer the query posed by the poster: I think more females would find two homosexual men in sexual affairs to be unattractive than they would find it pleasing.