That's your perineal raphe. In the womb everyone starts female, and that particular feature either becomes the scrotal/penile raphe (the scrotum seam) or the labia majora.
Because everyone starts off female that's the reason why men nipples to.
Edit: I know what I said
It is the reason we nipple yes.
I nipple!
Nipples to where?
In fact, some, like me, have more than two nipples
Thanks to you, I have fewer than the average number of nipples
Scaramanga, is that you?
That's your perineal raphe. In the womb everyone starts female, and that particular feature either becomes the scrotal/penile raphe (the scrotum seam) or the labia majora.
Because everyone starts off female that's the reason why men nipples to.
Edit: I know what I said
It is the reason we nipple yes.
I nipple!
Nipples to where?
In fact, some, like me, have more than two nipples
Thanks to you, I have fewer than the average number of nipples
Scaramanga, is that you?