Myth or fact:
Is there a Gspot in the anus?
I love your question phrasing. I'm gonna say MYTH.
However, there is a 'P' (prostate gland) spot inside mens butts. The prostate is a little walnut sized gland that lives a couple of inches up the rectum.
It is totally possible for dudes to achieve orgasm solely through prostate stimulation.
The lady equivalent to the prostate is the Skene's glands, but these are located on the vaginal anterior wall. So unfortunately it appears that females don't have a 'G-spot' in their butts. However, plenty of ladies still find pleasure in anal play.