It's not uncommon for herpes blister outbreaks on the penis to vary in terms of symptoms. Some people may experience pain, itching, and ulceration during a herpes outbreak, while others may have milder or even asymptomatic episodes. The location of the blisters can also influence how they feel; for instance, lesions on more sensitive areas like the genitals might be less noticeable than those in other parts of the body.

If you're experiencing symptom-free or mild outbreaks that don't hurt or itch much without ulcerating, it could simply be part of your body's unique response to the virus. Keep in mind that everyone's immune system reacts differently when dealing with infections like herpes. However, if you notice any changes or concerns about your symptoms pattern over time - such as frequent recurrence despite safe sex practices- consider discussing them with a healthcare professional who specializes in sexually transmitted infections (STIs) just to get some reassurance and guidance tailored specifically to your situation.