Taste of cum

A lot of people say their guy taste like salt or battery acid. I know diet has something to do with taste, but my guy tastes kind of good? it vaguely sweet/like nothing and slimy, that's the best way I can describe it. but his diet/lifestyle isn't the best, he drinks beer everyday, not overweight but he doesn't do the best to take care of his body. Is it just genetics maybe?