And for anyone with a penis, anal stimulation triggers pleasure in the prostate area (that walnut-sized gland positioned between the bladder and the penis). Anal penetration indirectly stimulates the A-spot within the vagina. You could be wondering how it is that you just haven’t heard about perineum pleasure or orgasms before now. Given the inconsistencies in intercourse schooling across the country, many of us aren’t absolutely conscious of our anatomy. If you don’t find it needed, and neither do I FWIW, it isn’t for you.