Can you insist on about this risky sex feat?

My girlfriend is really curious about have an*l sex. She says she at least possible wants to try it once. I loving of think that its a bit gross. Is the anus tighter than the virgina in most women? I'm sort of worried going on for brown stuff, how can I be sure that I won t get excrement on my entity?
Answers:

Does this happen to any one else?

Ask her to donate herself an enema before you do it and to not defecate until after you do it. That will assist clean things out.
You can use a condom to further hang on to yourself clean.
Most women I know are tighter within the back, so, stir slow and let her relax the sphincter previously you penetrate her fully - especially if you're big. Use a river based lube close to KY to ease things for both of you.
So that you can pocket your time and concentrate, find a comfortable position. Lying on your sides can be more relaxing than having her on adjectives fours with you kneel or her over a chair near you standing.
Experiment.

Does anybody know if there is something wrong beside this?

Wear a condom, use lubricant, take it smooth. Do not use too much force. It is tighter and to some women exciting. Most men think so more than women. If she desires to try you should do what she wants. As long as it doesn't hurt someone a couple should try hot things.