As much as I enjoy an idol swallowing, my attraction to gokkun is primarily due to the fact that it guarantees an oral comeshot, not just a facial one. For as long as I've been able to think sexual thoughts my particular fetish has been the female mouth. It is not only beautiful aesthetically, but, including the tongue, the mouth is the only prehensile sex organ. So prehensile, that it is used for one of the most delicate and subtle of voluntary body movements, namely speech. Applying such dexterity to the pursuit of providing sexual stimulation and you get the kind of ecstacy otherwise achieved only by intoxicants or extreme sports. So an oral comeshot represents, for me, the most erotic part of a female juxtaposed with the height of male sexual pleasure, the ejaculation.
If I am watching bukkake, I find it interesting to consider the bone structure and musculature of the idol. I'm going somewhere with this. Like a fingerprint, each face is different, obviously. This means, after the drone has dumped his load, say, on the bridge of the nose, some idols will have lines and dimples, etc that lead the goo toward the corners of the mouth. Others (perhaps "luckier" depending on perspective) will have features that draw it away, perhaps down the cheek to the jawline.

Cocomi Naruse instructs a class on proper aiming procedure, in Idea Pocket's DIGITAL CHANNEL 84 (SUPD-084).

Cheeks are a no-no! (I agree, and would also tell them to stay away from the forehead and hairline! I guess a lot of guys like it, as I see it so much..)
If I am watching bukkake, I find it interesting to consider the bone structure and musculature of the idol. I'm going somewhere with this. Like a fingerprint, each face is different, obviously. This means, after the drone has dumped his load, say, on the bridge of the nose, some idols will have lines and dimples, etc that lead the goo toward the corners of the mouth. Others (perhaps "luckier" depending on perspective) will have features that draw it away, perhaps down the cheek to the jawline.

Cocomi Naruse instructs a class on proper aiming procedure, in Idea Pocket's DIGITAL CHANNEL 84 (SUPD-084).

Cheeks are a no-no! (I agree, and would also tell them to stay away from the forehead and hairline! I guess a lot of guys like it, as I see it so much..)