Stretched Out

Saw a post recently from a female asking if a vagina can get stretched out and can guys tell? Well I am a 53 yr old male. During my sexual encounters I have experienced very tight vaginas and some not so tight. Nothing too far out of whack. But...
A few years ago I had several sexual encounters with a woman. She was a couple years older than me. When we first got together I questioned if she enjoyed anal sex. I definitely do. She told me "yes" and told me that her ex husband used to fuck her ass like 9 times out of 10. She further added he was quite large. That first time I brought some KY and started working my cock in her ass. It wasn't much work, my cock nearly fell in. Loose was not the word. I fucked her ass for quite some time and it was so loose I started to lose my erection. Her pussy on the other hand was quite nice. To give you an idea or description of just how loose her asshole was...
One encounter was a quickie in the office. I bent her over a desk and lifted up her dress. I inserted my cock directly in her asshole. COMPLETELY DRY! Not even a little spit. My cock went in easily without so much as a whimper from her. Now I don't claim to be John Holmes, average length but thick. But she was able to take it dry. I still couldn't get off and had to switch to her pussy to cum.