All, I'm thinking of picking up a dildo for my wife as a surprise. Good idea or bad? A while back while going down on her I inserted a few fingers. I could sense she was enjoying it so I pressed on. I was able to get all five just to my knuckles. Now we do it pretty often and she asks for it openly. I can get almost past my knuckles but I don't want to hurt her. I don't have an overly large sized hand but it's just awkwardly shaped. I'm debating getting her a surprise dildo. We have a few vibrators but nothing that comes close to large sized. As mentioned, wondering if this is a good idea and what would be a good size?