Personally, I can tell you that I experience all the effects of high arousal up to orgasm through anal fingering.
How the penis or clit becomes erect and the vulva becomes blood engorged, etc are signs of arousal that could occur through the stimulation of any of the various erogenous zones. It could even not be much physical, but through eyecandy or brainteaser. And it's specific to each person which zones trigger best :)
When it comes to anal stimulation considering women; the orgasm or pleasure could be a result of stimulating all the nerve-endings in the anus (about as much as a penis or clit!). Those can simply be stimulated by caressing the outside of the anus. It could be because you could stimulate the gspot indirectly by anal fingering or anal sex. Some women get stronger orgasms through the combination of clitoral stmulation and anal stimulation.
For men; as you've discovered one could stimulate the prostate through the anus, which is a highly arousing zone. For outer stimulation of the anus same goes as for women; lots of sensitive nerve-endings. Because of this physical advantage, men are even more likely to enjoy anal stimulation then women.
RedRoses
Posted: 03 Oct 08:51