I think I'm having that problem with my wife at this moment...It started after she gave birth to our daughter. I've got a thick, but normal size cock, so usually it was good for the ladies, they actually complimented that. I've only had a problem once with a girl cause she was too tight, she liked it, but I felt like wanting to cum all the time, got kind of uncomfortable. But anyway, my wife always had much fun on the sex and cummed a lot, I think probably because of the thickness but ever since she gave birth she almost always feels pain to start the sex. And nowadays we can't do many positions or for a long time cause it hurts her or makes her feel uncomfortable. Feels sad, cause in some cases I've read, the woman usually compensates somehow (like blowjobs, masturbation, footjobs etc), but in mine, it's just ended up in less sex...
