How did you even notice that??.
Your sus ...........
Well, his mother has a mole on her chin. I thought to myself, "Ah it's another character with a mole. Their child must also have one." I think it's just a common thing when artists draw a character with a mole, then someone related to that character might also have one. So, I began searching for his mole. Then, I found it on his left nipple. (▰˘◡˘▰)
Is that sooo........ Not judging btw.
He has a mole on his left nipple