Can you have bumps on your penis without having an STD?

Bumps on the penis could be a normal variant (e.g. fordyce spots, pearly penile papules), a noninfectious dermatologic problem (e.g. folliculitis), a reaction to chemical or mechanical irritation (e.g. shaving bumps --a particular type of folliculitis, or irritant dermatitis), genital warts, molluscum, genital herpes.