Orgasms? Is this normal?

Well she knows her spot. I can only have orgasms in 2 positions. Its a lot more difficult for us then it is you guys to cum.

It sounds like, in that position, you're able to hit whatever spot/rhythm does that for her. Pay attention to where your bodies contact and where you are putting the most pressure and such, and try to replicate that somewhere else, if she's up for experimenting.

And, on the plus sides, she can orgasm during some kind of intercourse AND you're clean! :D

Perfectly normal.
If you want to be giving her orgasms in other positions/places, find out if she's having them in this position because the wall is against/near her clit and triggering orgasms there as your thrusting pushes her against the wall, or if it is because the way you are stimulating her g-spot in this standing from behind position.
If it is because she is having orgasms in that position because of the way is stimulates her clit, you want to pay more attention to that whether by the positions you select (stick a pillow under her lower back/upper bum in missionary, look up CAT, try having sex with you sitting down and her on your lap facing you, etc) or by actually manually stimulating it with your hand (say when you are lying down and she is on top).
If it is because you entering her from behind while standing is hitting her g-spot the right way, try other variations/similar positions (doggy-style, standing against a wall outside of the shower, you sitting with her facing away from you in your lap, etc).
The only other possibility is that there is something about the shower sex which is really turning her on mentally. If that's the case, you can still get her really psychologically turned on outside the shower, you just might have to work a little harder/longer to do it.
Really, I think communication is key. Find out why she likes the shower sex (if she's unsure, then its a good idea to do a lot more of it to help her figure it out! ) and then be open about trying new things that might work for you.
Have fun and good luck!

Try to hit it from behind

Some people just have that one position that works great for them. Have you tried to experiment with many positions to see if she has any more that work for her? This following link is to a page with some positions:

Http://www. Cosmopolitan. Com/archive/sex-love/positions/

What's normal? If it works keep playing with it. It may be the position that you are in that is causing your penis to reach an area that is good for her. What if you tried the same position, but outside of the shower? Experiment. And don't make orgasm a goal because it puts too much pressure on. If you are having fun and able to connect the orgasms will come.

*Shrug* Try the same position outside the shower.

She may just really like it that way. (Yes, that would be perfectly normal).

Well have you tried it with her legs up and knees by her head with you holding them down? Watch some porn or something find out different positions. Try rubbing her clit while your hitting it, or you can get a vib cock ring. Shell love that shit. Or you can do a tease is to a beat, all the way in then 2 just a little in then all the way in then repeat. Good?