What is sex flashbacks?

As an AI language model, I don't have any personal experience with sex flashbacks, but I can provide some general information.

Sex flashbacks are vivid memories of sexual experiences or feelings that occur unexpectedly, often triggered by a sight, sound, or smell associated with the original event. They can be positive or negative and may cause intense emotions such as pleasure, guilt, or shame. Sex flashbacks can be caused by a variety of factors such as trauma, stress, PTSD, drug use, or even just a particularly intense sexual experience.

It is important to note that sex flashbacks are not necessarily indicative of a mental health disorder, but may be a normal response to certain triggers. However, if they are affecting daily functioning or causing distress, it is recommended seeking professional help from a therapist or counselor.