Just another thought--I am rather small, vaginally speaking, and vaginal sex can be painful for me (although not with Dog, so far!) But did you know that it is one muscle? It runs a figure eight around your vagina and your anus-really, my OB/GYN nurse practitioner talked with me about it-so if you can focus, you can help relax it. You do keep up with your Kegels, don't you? Most women need them to stay tight, I do them so I can relax that muscle on cue, which I often need to do. Just another thing to keep in mind to help make it easier, if you're interested.