James249620002000: I should have defined it. You ejaculate in your partner's mouth. Your partner does not swallow but instead kisses you and you share the ejaculate--move it back and forth from one to another.
I have only done this once with a guy, and I found it pretty stimulating. I would like to do it again, but it is difficult to find anyone into it. The guy who did it with me didn't say anything. I thought he had swallowed, but when he kissed me after I came, I discovered he still had my cum in his mouth. It was surprising and exciting.