Since being with my boyfriend, who by far has the largest cock I have ever seen, I have been experiencing pain during penetration particularly when he goes deep. I assumed this was due to his size as it has never happened with previous partners. I went for a routine smear recently, and I was asked about pain during intercourse and I answered that intercourse was sometimes painful.The result being that now my GP wants me investigated for endometriosis. No mention was made about the size of my partner. Doing a search on endometriosis there is lots of info, pain during sex is often mentioned as a symptom, but penis size is not mentioned. I know its difficult to be exact here, and there are other symptoms involved with diagnosis. Has anyone here who regularly had sex with a larger guy experienced pain during sex been diagnosed with endometriosis that might not have been diagnosed if they had a smaller partner? If asked about pain during sex, would you mention that your partner was very large?