The white color on the head of the penis may be vitiligo, a harmless loss of pigment common in the area. A dermatologist can use a Wood's light (ultraviolet) to tell if this is so. The "blisterlike" lesions are, I agree, not likely to be herpes and more likely to be secondary to friction, but again, a doctor would need to see them and perhaps culture them to tell for sure.
Take care.
Dr. Rockoff