Lifting Heavy and Sex

I'm not giving any time frames, but I noticed something a while back. I had a particularly heavy and voluminousness deadlift session and the next day sexy times were initiated by my SO. So, while I was doing my thing, every time I would make a certain forward thrust movement my butt cheeks would hurt from the previous day's session. This caused me to jump every time, which was hell for me but turned into a good time for her, lol! Any other heavy lifters have similar stories of unintended "prowess" betwixt the sheets?

Also CORE WORK! Dude, you would be surprised at how much stronger you are once you start getting that core together. It's serious bidness!