shaneer,
First let me say that although I love anal sex, it is not for everyone...we alll have our own tastes/likes/dislikes and some gals just don't want something shoved up their bum. If you do want to have sex the absolute first rule is lubrication (this is a must) as you butthole is very tight and there is a need for external help in getting it loosened up and slippery. Second, you have got to be in the mood, let's face it, if you don't want a penis shoved inside you then it's not going to happen, on the other hand if you are aroused, and have relaxed your anus then it can happen. Your husband needs to understand that he must get you going and aroused so that you will be more open to experimenting. Third, your hubby has to go slowly at first, none of this shove the pole in the hole with all his might stuff, cause that will hurt you (ask him what his reaction would be having a broomstick shoved up his butt!). He should ease in his penis and do slow strokes, at least until you are comfortable be entered anally and then he can speed it up a bit - be careful and trust your body as to how fast or slow or deep you allow the penis.
Lastly, you have to be confident that your husband will pull out whenever you tell him. It may seem like a burden for him, but if you know that you can have his penis removed whenever you need to, it will relieve some stress and, again allow you to relax.
Hope this has answered your question,
Wendy