Ask a girl whether she gives oral, and she will give a straight answer. It is, after all, a yes or no question.
Ask a guy, however, and you will get, "What if you start and she doesn't reciprocate?" or "What if she isn't any good at giving head? You cannot reward a subpar performance." Or worse yet, "What if her stuff isn't clean? I mean, I don't wanna put my face down there if I think there may be a biohazard," or "Only scary thing is that the HPV virus can be transmitted through these type of acts ... " (all taken from the jhuconfessions.com thread "Sexual Reciprocity").
Some of these are genuine concerns. No one wants to catch HPV, or lick anything generally unclean. With girls, however, it is understood. No one needs to outline in her Oral Contract the Genital Warts Exception.
Guys talk about this not because they are genuinely concerned (though they may become concerned after focusing on HPV while deliberating on oral sex), but precisely because they are hesitant about it.
Their general uncertainty leads them to look for things both to delay the affirmation and to justify their hesitance, and the lack of justification for this sexual inequality is telling. It is not as though guys have to worry more than girls about any of this, and hey! there is always the dental dam!
The only real motivation behind the reluctance seems to be a genuine disgust. Disgust, a type of fear, comes from two concepts. One, that somehow you are worth more than something else (arrogance), and two, that that very thing can somehow negatively affect you.
If you are unconvinced, I invite you to remember that calling someone a pussy or vagina or dick or penis is not a compliment.
This is just silly! The nether-regions (note the euphemism) are not going to hurt you. Be nice to them, and they will be nice back! So adorn your cheese grill and try a taco.
On the note of euphemism, probably the most popular is to "return the favor," a clear indication that most men view their oral responsibilities as reciprocal, or, "only when necessary." We men will be damned if we are going to do something "gross" without receiving any immediate benefit, unless, of course, our better halves force us into it. But I beg men to look at the benefits overall.
For one thing, the philosophical argument of greed versus altruism is clearly in favor of sexual reciprocity, and one must integrate philosophy into life. There is nothing solely physical or intellectual. The better the integration, the better the event, which brings us to my second point - to be attractive is positively correlated with how secure a person you are (on a large and general scale).
The more developed (or integrated) a person is in each of the four realms (intellectual, physical, emotional, spiritual), the more secure (s)he will be.
Bottom line: Not only are the physical benefits attractive to women, but so is the attitude attained by giving to your women! They will want to give more to you for your generosity. All else equal, women will choose the guy with the girl in mind, not the guy with the girl on his mind.
Moreover, most guys are experientially unfamiliar with the specifics of the female anatomy. Why? Because they never bother to look at it! The most glorious place on Earth, whence we come, and where we spend the rest of our lives trying to return, how many men can draw one for you?
And how many other men would be able to tell whether it was upside down? To my knowledge, there has been no such study, but I would bet fewer-than-should on both experiments.
To be experientially familiar with vagina is to have more ability and comfort on your side, thereby making you more attractive. This means you will be more equipped for general foreplay (foreplay! love it!) and sex itself.
If using the oral fun for foreplay, then what luck you will have, having (firstly) lubricated her with your saliva and her stimulated state, and secondly, brought her closer to orgasm. No longer will you have to worry quite so much about finishing first, and if you have been doing your exercises, you two can last indefinitely!
If you have an inside-girl, this will probably be reserved for foreplay. Gene Simmons notwithstanding, most men cannot reach quite so far with their tongues as they can with their sex pistols. And that is fine.
Girls are not required to accept what you are offering.
It is simply a douchey double standard.