I had an interest in eating a creampie for many years. When i was in my mid 20's and married to my ex wife, i would be all horned up and really desire to lick my cum from her pussy. So we would fuck and immediately after i came, I was NOT interested at all! So instead, i would try snowballing..... I'd sit on the edge of the bed, have her kneel on the floor and suck me, telling her that as soon as i start cumming, on the 1st or 2nd shot, immediately come up and kiss me with it. If she was very quick about it, it would go well and I'd enjoy it for a minute before i lost the excitement and would be turned off by it. We did that many times before i got really comfortable with it all.
After we divorced, i dated women and would request the same thing and they usually had no problem with doing it. I would tell them my desire to eat a creampie and we would fantasize about it frequently but didn't get to try it until i dated this one woman and i came up with the idea of having her lie on the very edge of the bed, with 2 pillows under her ass and legs drawn back. I would fuck her until i was getting close, i would have her spread her pussy open in a way that it created an open hole and i would stroke myself, stopping as i got to the very edge of cumming..... Sometimes it took many attempts, sometimes i would orgasm and i lost the feeling about doing it but when i was successful, i would not orgasm but the muscle would relax that released cum and it would flow out, hitting her pussy and clit, then fall into the hole of her open pussy.
Then i would immediately go down and lick her pussy, sticking my tongue in her as deep as it would go, have her push gently, making the cum rise to the opening of her pussy. The cum doesn't taste as strong when it's in a pussy, as it does if it's just straight, like when women kissed me with it.