I have noticed that some woman do like this. As for why, there could be many reasons both physical and psychological. One could be autoertoic asphyxiation, the lack of oxygen could be heightening the intensity of an aroused state. Since some woman do climax while giving oral sex without direct stimulation or by squeezing their legs together to create enough contact to produce an orgasm this could be part of the equation. A woman's body is so much more complex than a man's concerning sexuality. Men are kind of like a model T Ford and women are more like the latest sports car or luxury car with all the amenities. So the physical part could be the lack of oxygen to the brain or also during the act some women might find pleasure in having their mouths and throats stimulated in such a manner not only by direct contact but the taste and smell sensors. They probably are not only in the nose and mouth but all over the nasal and throat passages. Maybe not as many as the tip of the tongue but they are probably there. Next would be the psychological effect, oral fixations and just plain loving to suck cock. This could also include being dominated and the person being used. There is also the pride factor of look what I can do, ha ha. Since not many women can deep throat, not many people can overcome the gag reflex. Then again back to the physical part of the rough sex possibility. Maybe they just like the feeling of rough sex and their body responds to being assaulted in some way. This would be possibly akin to choking. Getting a penis shoved down your throat and choking you could be a very highly erotic practice for some people for so many reasons. I would think if a person enjoyed more than one of the many reasons for giving oral sex doing that might satisfy many of them at the same time plus some not associated with oral sex alone. In other words it satisfies the oral sex desire and others like being dominated or forced into sex or used, the lack of oxygen aspect and many others all in one sex act.

A few years ago I learned to deep throat through being gagged by a succession of penises until I surrendered my natural reflexes completely. Interestingly since then I have only deep throated a couple of times and only to show them how youthful and hip I am (which of course I am neither at all!). I wanted to learn and be pleasing so I allowed it but never enjoyed it at all.

Mmmmm!