Hey, I think I have seen a friend with similar "spots" or pigmentations - you are talking about the slight tan pigmentations on the "head" of the penis, correct?
I think you may be on to something if you think the girl had a fungus. My friend is in denial but I think he may have candida overgrowth and that would make sense, because he isnt circumsized and I swear I have seen the same pigmentation - even darker freckle or distinct mole type spots on his. I thought it was maybe because he's old, but he's showed me several times because he was born with a birth defect and we have discussed it at length.
Do you have any other health problems that could indicate you could be suffering from some candida overgrowth? If so, there is a WEALTH of information on this site and some wonderful sources of help.
If there isnt any pain in the penis, I wouldnt worry, but I would definitely check into the candida thing, because lots of us are suffering from an imbalance in candida and dont know it.