Whats the longest period of time you have had straight sex?

I had some dental work done last year. And that pain medication if properly used could inhibit my ejaculations Now usually it just took alot longer to achieve, but a few times I could not orgasm at all. One such night I had sex for nearly 4 hours straight. I was sore for 3 days afterwards. My gf at the time enjoyed being stimulated as much as possible. I think she was ultimately satisfied that night