Hummm this thread speaks to me.
As a COF lover ill try to explain it to you best i can but...
I think it start as a fetish that can't really be explained. Why some guys are into foot fetish? I never cared one bit for feets, they are among my least favorite part of a body. But some guys care for them a lot. Its their thing. First porn i ever watched ended in a COF, so that could maybe explain it partially. But i loved that visuals right away, while other stuff never stuck with me. For instance i love CIM too, i love cumplay with the mouth/tongue, but i absolutely do not like creampies (cum in pussy in porn). Not one bit. But COF, the prettier the woman, the hottest it is for me. And yes maybe there is some sort of "dominance" factor, as in she is getting "a part of you" on her face, but its not the main thing either. I love the visual, i find that erotic, and like i said pretty woman with cum on face is just so hot.
Personally i can't cum in a condom. I never had sex that was not protected (because i only slept with escorts) so i can't really comment if i could cum or not without it(with a life parter), but i just can't currently when i see escorts. I enjoy CIM and of course if its provided ill be very happy, but if COF is allow more often than not ill rather go with it, especially if SW is not part of the cim service. COB is like "the consolation price", ultimately its alright and "does it", and if she is busty i kinda like the visual too ... lol, but its really my least favorite of the 3. I never had an escort not allowing COB at the very least. That would be very very disapointing having no way to finish "properly". I mean at home i jerk myself in a kleenex but this ain't my idea of a fun time with an escort lol.
Obviously the best way to finish for me is the ultimate porn combo, open mouth COF/CIM and SW what land in the mouth, then after admiring "my work of art"
she scoop some with her finger and swallow a bit more. That is just amazing