Pumped or not I think any hole, pussy or asshole can acclimate and take a fucking big one on a daily basis. I was petrified to try my bud's 6.5" of girth. When I did, as said many times, I was amazed at how I opened up and took him so beautifully. It felt wonderful to take that much and love the sensations it sent through my body. Another thought, a woman can give birth to a baby a LOT bigger than 6.5-7.0" of cock girth. A hole can stretch really big and go back.
Another amazing factor about the anus, for me at least- I take my bud's 6.5 girth so easy. A couple of weeks ago a new friend came over and fucked me with a much smaller cock, much thinner too. It like to have killed me when he shoved it in. I think it has something to do with the natural rebelling of the anal muscle. On a really big one it seems the muscle surrenders because the stretch is so big, where on thinner cocks the muscle rebels and causes the pain.
Any other opinions or stories?