The muscle at the top of the anus leading into the rectum is an involuntary muscle unlike the voluntary external muscle we are all used to relaxing to accommodate the initial entry of the top's dick. I've found that if the top hits that muscle at the top of my anus, it will eventually open to allow the dick into the rectum. If the top stops when the tip of his dick hits that muscle and continues to apply gentle pressure, he is able to enter my rectum rather easily. And, wow, what a mind blowing experience it is. The first time a top penetrated beyond my second ring was pure joy and ecstasy. And it was even more electric when he bred me deep in my guts. I have always thought it was nothing more than hyperbole when I heard folks talk about seeing fireworks during the peak of sexual arousal. Well, I now realize it is something real and that is where I want all future loads. I admit I've only had this current top be able to hit the right spots to generate this reaction in me. I fear he has ruined me, since the few tops he has shared me with haven't been able to provide any place near as enjoyable an experience as he can. I continue to enjoy being whored out to other tops when it pleases him or when he needs a break during lengthy fuck sessions. But, I think it is easier for me to make sure it is a memorable experience for tops when I too am enjoying serving them. Regardless, I recognize my purpose is to please my Sir and anyone he shares me with.