From a woman's point of view, eating cum is pretty simple. You get a guy excited and let him cum while he is in your mouth. Now I admit, I was a spitter for a long time but once I got to into it, it really is much neater to just gulp it down. No fuss, no muss. At least when I am taking it direct from the tap. Licking it off something does not interest me. If he wants to cum on my tits or stomach, then I am just going to wipe it off. If he wants me to swallow, get it in my mouth. I would imagine most guys have at least tasted their cum as I imagine most women have sucked a finger that has been gainfully employed between their legs. I can understand a guy losing interest in eating their cum after they cum. I know after I have had my orgasm, I am inclined to want to rest and even snooze. Most guys try to make sure I cum before they do, so BJ's are often completed when I am more interested in resting but one does have to reward good work. Not sure what I am talking about here but jerking off onto something and licking it up would not have much appeal to me. Why not just find a guy to suck and you can both cum at the same time.
I'm with you, Hester! Although, If I haven't already gotten off myself, playing with some cum on this, that or the other body part can be hot enough to enjoy. I'm also happy to catch a load in my mouth and share it back to my guy. It took him a while to work up enough gumption to ask for that, and a while longer for it to become normal but now we both enjoy it. I think taking it from my familiar lips helps with his post-orgasm loss of enthuiasm. If I finish him after he's already taken care of me, that hot, sloppy kiss can fire me back up. We've had one swinging weekend with a couple we're good friends with. That had the guys experimenting on each other, but not all the way to cumming. That's still a work in progress, but I was proud of them for pushing past their prejudices to give it a try!