I have moved up from a small plug to a 5.75" diameter plug in a few months. I'm not getting the stretched/full feeling I want. Any advice on stretching to use a larger plug? (I can get a 7" plug in, but insertion hurts...once in it's perfect.) I enjoy the stretched feeling higher up. The tapered plugs in between the 5.75 plug and the 7" plug don't satify that feeling.