Ok...let me throw my $.02 in....
Since I do enjoy swallowing, I have tasted many, many men who have unloaded in my mouth. And if they don't cum in my mouth, I usually lick up their cum, or lick it off of my hand, ect. I just love cum!
For the most part, if a gentleman smokes half a pack of ciggerattes or more a day, I notice a taste differance. I usually pull up and say 'So you're a smoker?' And most of the times I am right. Same thing goes for coffee drinkers...I can almost always tell when they are big coffee drinkers.
I am not saying EVERYONE can taste it, but like I have mentioned earlier, I have been an on again, off again smoker myself, and yes, I do enjoy tasteing my own cum. I have noticed that I taste differant when I'm smoking, then when I'm not. I don't think the taste is bad though, just differant. The same with coffee...if I have had a lot more coffee then usual, I can tell a differance then too.
Oh yeah, and sweets....I can tell if you are a big sugar eater! I know I am!