I've tasted my cum many times (I'm so hot that I don't loose the interest). If you're very excited you can do it too. Try to think in what turn you on most. If you keep your cum it changes into liquid, and the taste is different.
Of course, I imagine receiving it from another man must be the...
When we were young, I used to persuade my girlfriend (now my wife) to dress sexy, and I remember getting horny with men watching her... it was awesome. Unfortunately, no men has seen her naked, but i imagine the feeling must be red hot...