So I've let my significant other have anal sex with me when we can. We he a long distance relationship and see each other every 2 months or so. This last time, instead of using our usual "friend built for two", a glass "butt plug" type thing was brought to bear. The thing is, I was impenetrable. The comment was made "you're as hard as a rock," meaning that I seemed impenetrable even with plenty of lube. I am at a loss. It's not as though I wasn't prepared and there wasn't plenty of time to relax. Is something wrong with me that I cant take even something small? Should I be clandestinely stretching myself somehow between visits? What do people do to accommodate that kind of anal penetration?