Seriously if you've got a concern about your health go and see a doctor - don't spend a year wondering and worrying.
If you've ever engaged in sexual activity I'd go and get a check up a your local sexual health clinic.
or
If you've never engaged in sexual activity I'd pop along to the doctor with anything that is of concern.
It sounds like you may be describing pearly papules, which are common and don't require any treatment.
Slight 'cracks' around your penis sounds like a purely cosmetic concern (if you look at your hands you'll see similar cracks and lines) if you don't have any other symptoms and is unlikely to be something to worry about.