These dark spots can be Fordyce spots which are normally present on the penis, freckles or lentigo. I would suggest you to get it evaluated from a dermatologist and get the diagnosis confirmed. Lentigo is a small, sharply circumscribed, pigmented macule surrounded by normal-appearing skin.
You cannot remove them at home.Cryosurgery using liquid nitrogen and laser are the main treatment modalities. I hope it helps. Take care and regards.
Speedy reply, appreciate it bud. Now is something like this pretty serious or minor?