Yep, I understand what your saying, but then you look at the majority of straight men... the sight of gay men doing sexual things can literally turn their stomachs, that's sexual, so why isn't mother nature playing its part there?
Straight men will love anythng that involves a females body, girl on girl action... well there's double the fun. Now i'm not sure about this but my boy friend(not partner) was discussing this with me earlier and he said lesbian porn doesn't do anything special for him, it's not a turn on to watch, but if two girls were there in front of him touching each other up and whatnot that would be arousing to him *as long as he could join in*, if he couldn't, there would be no point. I don't know how many men this applies to so I'll leave it at this, if what my boy friend said is true, men on general would actually prefer bisexuals to lesbians, the lesbian fantasy is obviously not very thought out if the men like to imagine themselves with the girls. I've always thought being aroused would accopmany the desire to be involved in the act that is arousing, so maybe a man could help us out on that lesbian turn on thing you have there?
Lesbians are attractive to women as your seeing a woman pleasure another, woman normally know exactly where they like to be touched and how, thus applying it to another woman who's desires are most likely near enough the same. Where alot of men don't have a clue about a womans body, and in my experience alot of men are selfish in the bedroom (mind what i say...not ALL men) and don't pay much attention to your own hot spots by instead rushing into the 'good stuff' (for them). Lesbians *can* highlight the joys of girl on girl sex, the knowing everything about your body, where exactly to touch, putting into practise what is normally pleasurable to them. Girls can usually pick up on alot of things guys miss, that could be in communicating or in physical touch, but it all depends on the individual.
So why is it alot of girls can look at all forms of sex (heterosexual, bisexual, homosexual...) and can (in alot of cases) get a kick out of all when alot of men can't? Straight men can look at male gay sex and be disgusted, but can look at girl gay sex and be in heaven
I know this all wont apply to *everyone* and I've said all this based on what i've seen and picked up in my own personal experiences. I am completely open to the possibility that what i've said could all be aload of nonsense in the bigger picture, so hopefully no one will be offended in any way.
. And not really up to 2 guys and a girl, but will watch with the right person. PORN 2 
