Personal experience
I will say that rimming feels great. I have had the pleasure of being rimmed a few times and it felt NICE. Of course I love returning the favor. There was this one SP who would grab me by my face and suck on my lips hard after I rimmed her. That made me dive back between her ass cheeks again and she would keep kissing me. Talk about DIRTY and HOT at the same time.
As far as digits are concerned, I have to say I enjoy it simply because it is kind of a taboo. Otherwise, I honestly have
not felt any physical pleasure at all,
NONE whatsoever. Once an sp used a small dildo as well. One said she is massaging my prostate, but I don't think she could locate it. So it's not just us men who get lost while looking for the G spot, it is women who might not be able to find guys' P-spot.
During my experiences with rear door pleasuring, many SP's very wisely used some lube, some Asian ladies used a condom and both of these were not as painful. Some sp just shoved their fingers up there. It hurt, it really did because of the dryness and of course because of their long sharp finger nails. Ladies, anuses are not vaginas, they are not naturally lubed no matter how aroused a guy is. So please use some lube on guys.
So to conclude, despite
no real physical/sexual pleasure with digital entry, I will still would not say no to a finger up there simply because it feels dirty.
General Observation:
Having watched lots of porn, I am sure it is true what they say about prostate stimulation. I have seen guys cum with nothing but a big dildo up their butts. Having said that, I have NOT seen a guy cumming only with a female fingering him. Only time guys came with a female besides them was when eventually the female used their mouths or hands on them . May be like what I said about not being able to hit the 'P'-spot of a guy is not as easy as it seems. lol.
I will add one more thing. Again this is based on what I saw in porn. Watch a guy being rammed in the butt, you will rarely see him having or maintaining an erection. Again, I know that prostate can be stimulated, but then how come they are not erect. I did some research and from what I understand, a guy might not necessarily have an erection to have an orgasm via prostate stimulation. Apparently, in some cases, some nurses are trained to use their finger to collect semen sample, just in case a guy is having problems discharging semen during specimen collection.
So who knows. If you like it, have it done, if not then nature has given a decent sized stimulation thing up front too.