Do wet dreams cause acne if you have them too frequently?
This is one of those problems where people assume that if two things happen close together, then the first must cause the second. There can be other reasons.
The frequency of wet dreams is somewhat due to the amount of testosterone in the body. Higher levels makes a man produce semen faster, when makes the occurrence of wet dreams more frequent. But higher testosterone will also make the oil glands in the skin to produce more oil, giving a greater chance that the gland will get clogged and that leads to acne.
So wet dreams don't cause acne, but the same cause of wet dreams also can cause oily skin that can cause acne.