I've made a couple with my current g/f, some are great, some are really great, and it turns me on to see her watching herself. I've had one girlfriend who was terrified of my showing someone and thus destroyed the tape, but my current knows me better than that. The more spontanious the better, dont try to put too much thought into it or she might get weirded out, but on the other hand have a couple of ideas so you can direct and have something worthwhile to watch back. Overall you'll either have a blast making it or watching it back. Give it a go, what is there to lose? and if it turns out good, theres a whole board of peole here that will gladly watch and give you pointers.