Your going at this the wrong way. Porn is not the issue, but the way you feel about yourself, that's the whole thing in a nutshell.

Use your computer to Google books on building self confidence, and self esteem, and learn to cope with your own feelings, so you can put porn, sex, and everything else in their proper perspective, and not take it as a personal threat to your womanhood.

That's where you start the learning process, with you. Everything else will fall in place, and you won't have those feelings in the pit of your stomach, when your sharing things like porn, or anything else, with your man.