I'm the same way. Back when I was self sucking, while i'm doing it I'm actually getting more turned on at the thought of my own semen shooting down my throat, but after it happened the want to eat it is gone.
Of course there's no turning back when your mouth is full, but when I would think about eating it while I was JO'ing and cum in my free hand or container, but then opt against eating it after the fact.
It's good to hear that others have the same feelings about this.
Though I've never self-sucked, I've often tasted my pre-cum and loved it.
I've positioned myself so my feet are behind me against the wall and my
cock is above my face, but when I get ready to shoot my load I lose the
desire.
Something I have done, and do fairly regularly, is start jerking off in the shower. I can get right to the point of climaxing, then hold off just before
exploding. If I do it just right I can get the real white cum to spill out, but
I haven't really had the orgasm feeling. Then I can lick it off my fingers and it tastes pretty good. Try this: brush your teeth or put some toothpaste in your mouth and using your saliva make it almost like mouthwash. You'll be amazed how good your load tastes with the "pre-rinse" toothpaste.
One of these days I may shoot my load into my mouth and swallow....just
haven't quite been able to pull the trigger (so to speak).
P.S. -- I have swallowed other men's cum....the taste can vary considerably. A friend of mine I first sucked when I was 18 (34 years ago), who's 20 years older than me, had an incredibly sweet-tasting load. Another guy I knew from my home town tasted salty and sort of bitter....not very pleasant. I heard several years ago that pineapple juice, and maybe other foods/beverages, can
affect the taste of cum. (Guess I'll rush to the store for a gallon of pineapple juice.)