It is a very basic mechanical question.
You have one cylindrical thing attempting to cause friction inside a space of certain volume. The more volume the inserted item has closer to the volume of the space the higher greater the amount of friction and possibility of friction. As the item approaches the total volume of the space the more 'intense' the effect.
acromegaly;657696 said:
Sex with a little dick I could last for ever and girls could take it forever and would not orgasm. With a big dick my wife's pussy feels tighter and she moans louder more animalistic she says it hurts but I know she loves it she comes every time
The same.
The thing is though there is a, 'too much' line.
Say it was the other way around, we are considering how tight you should grip a penis, instead of what girth is usually about, how intense a penis can push on the vaginal walls.
Scenario: woman giving a hand-job
If she did it too losely you would never come, you may start to lose wood.
If she did it too tight, you'd feel the friction for sure, but it is uncomfortable and you'll come, but it was a rough handjob. Fun the one time you're really 'on fire' and wanted it as rough as possible.
Most times you'd leave wanting go back to that woman's hands only if she got close to JUST RIGHT, that she did it amazing, felt fucking great all along and you come when you had to.
That might start to explain the experience that just right girth and going beyond it will most likely leave a woman.