Why Does His Taste So Sweet

A couple of times a year my girlfriend (whom is bi too) have a wicked weekend of gay sex just to spice things up a bit. She loves eating pussy and I thoroughly enjoy sucking a big hard cock. This past weekend, I had the pleasure of deepthroating almost 8" of thick, cut manmeat. Got together with this guy she works with, who is roughly half our age and ended up at his place sucking each other off endlessly, in a 69. I don't fuck guys, just suck. Started the night off on his leather couch. I laid on my back with my legs over the back of his couch while he hovered over me. I started off licking and swirling my tongue all over his huge, smooth, shiny knob then slowly engulfed most of his cock down my throat while he did the same to me. Over the years, Iv"e sucked quite a few cocks and always enjoy the thrill of swallowing cum but his was so fucking sweet that I could just not get enough. Usually kinda salty but not his. Lost track of how many of his huge loads I actually swallowed but it was glorious. I have read that diet has a lot to do with the taste, but this was ridiculous. Just wondered if others have had this experience.