I have done similar. I mean not immediately after, but shortly after maybe if she fell asleep. I’m just still so fucking horny. For me it’s that the sex feels so good I just want more and more. And unfortunately, my SO just does not have same level of sex drive I do. So if I asked her an hour after we just had sex to have sex again, she would just be like no I’m too tired.
The more I have sex, the more I want it, and she is not always going to be up for it, and that is completely understandable. That leaves me with nothing left but my hand.
So basically I have done something similar and it has nothing to do with poor performance by my SO.