The phenomenon that results from an excessive amount of sexual activity with one's partner, wherein one's genitals and/or orifices are too sore to be of any further use in the near future.
We both had some really bad sexual exhaustion. I couldn't go down on her again because my mouth was still sore. She couldn't go down on me because her mouth was still sore. We couldn't have sex because her cunt was still sore. That left us with only one other option.