My girlfriend and I have been with each other for quite a while, and have experimented with quite a bit of different acts. She loves a little bit of bondage, and is opening up to anal. Here's the thing; she's wierdly opposed to me buying her a vibrator or other toys to further add variety to the boudoir, and I have no idea why. We've used a toy or two before, but only briefly yet I still made her cum. I know she'd love adding a vibrator occasionally, yet she's being strangely stubborn about it. Any ideas/tips?