Buying big dildo for gf....bad idea?

It's like buying a motorcycle, what size can I handle. Too small and you wish you had got the bigger one, to big and it scares you, hard to handle and enjoy. But with the bigger one you will become comfortable with it over time as long as you take it slow, you even start to enjoy the ride. In the end most who started small ended up with big. Would you rather tell you friends that you ride a moped or a hog. My wife handles her hog quite well and enjoys the hell out of it, and I love watching her ride it. I help her ride it all the time . Great sex great fun. Remember the bigger the toy the greater the joy!