You could have too much fun and not get any sleep tonight... worry perhaps, what did I say, what did I do, oh god! or just not get any sleep... or waking up in the morning thinking pretty much the same thing.
those other two cards ...still sounds like a really good time, some say Death might refer to the 'little death' associated with climactic pleasure, which would explain the 9 Swords of losing sleep.
If you can't be a good example -
- then you will just have to be a horrible warning