BlackBolt,
My question is if you give a girl great orgasmic sex once, then can't get it up the next time, is there a way to get her back over again for another chance? If so, what is the best way to get her back over for next time without apologizing/seeming needy or less powerful?
The first sex you have with her is definitely the most important; if she's already aware of the fact that you're capable of giving her mind-blowing sex, then she's probably not going to fret too much if you have a rough night getting it up. She
might worry that maybe you suddenly don't find her attractive anymore if you suddenly can't get it up, but that would likely just make her try
harder to see you again and win you over.
As far as how you handle a situation like that, it's best to handle it right there the moment it's happening. There's different ways of handling it, but the way I would probably go about it is by making it somewhat of a joke/funny situation and by also making it seem like the reason has
nothing to do with her and everything to do with you. For example:
You: Sorry babe, I think the thought of you being naked in my bed earlier today caused me to masturbate and wear me out. Now I can't get it up!

(Give her a sly smile here and show her that you're not bothered by it)
If you want to see her again, I would recommend chilling with her in bed for awhile and talking/cuddling with her, even if you can't get it up. That way she doesn't feel like you just "kicked her out" because you couldn't get your rocks off with her. As long as she feels like you've treated her well, then the majority of the time she will surely want to come back if you've already given her great sex before.
- Franco