Post-masturbation guilt is well-documented in the literature, stemming from the intersection of moral standards, psychological distress, and cultural or religious taboos.
The claim posits that post-masturbation guilt stems from cultural and psychological factors. Multiple retrieved papers explicitly discuss how moral standards, religious backgrounds, internal conflicts, and psychological distress contribute to feelings of guilt and shame associated with masturbation. Therefore, the evidence strongly supports the claim, yielding a verdict of SUPPORTED.