Hello,
These can be due to moles or even benign skin growths like seborrheic keratosis or Fordyce spots which resemble moles. If he has it for a long time then chances of warts are less. However until and unless a biopsy skin is done, diagnosis cannot be confirmed.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
A mole seems most likely if he's always had them. A lot of guys have skin tags. There are a lot of odd growths. My BF has a mole on his tummy that looks like a third nipple. He says it's just a mole, but I wish the doc would have taken it off when he asked him to. The doc said to leave it alone.