Yeah there's one that I've wondered for a while now. Awhile back, I found out that women don't have prostates but they can still feel pleasure from that hole. How can they feel pleasure from that hole if they don't have a prostate?
Not female, but my guess would be that since women have what is effectively the same as the head of a penis hidden inside, and the walls of the rectum are pretty thin, it'll be getting knocked about a bit care if its close proximity. Some may enjoy this.
Analog: How can you feel pleasure from someone sucking on your finger for instance?
My biggest sexual organ is my brain and when my body is used to get someone else off, I, too get off on it. It feels so so so so good to take dick in the ass (especially if they hit my prostate, but that part is not necessary).
How is a dick different than a toy . . . in terms of physical sensations?
Physically only?
there’s the person attached to it who’s enjoying ramming you
temperature
unless someone else is toying you, you’re missing out on submitting to their rhythm
the sound (not physical, but not strictly emotional)
that the top is getting off too from the exact same friction (again not exactly physical, but I would have a hard time saying it’s just as good having someone toy you and jo at the same time as it is if he’s fucking you)