As an STD assistant, I can assure you that staph or strep infections typically do not cause blisters on the penis. Blisters on the penis are more commonly associated with sexually transmitted infections like herpes. If you're experiencing blister-like sores on your genitals, it's important to get tested for STIs and consult a healthcare provider for proper diagnosis and treatment. Remember to practice safe sex and always use protection to reduce the risk of contracting STIs.