Do not be concerned: It is not due to self sex, nor do we care if you occasionally do it.Since it is considered a normal part of human sexuality, I would consider you odd if you never did. Bacne can be related to skin sensitivity to a variety of chemicals in your shampoo, which drains down your back.Methyl parabens are noted as one triggering agent.Check your product & consider going paraben free.
Answered 12/26/2016
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