Dh and I kinda have 'quiet' DTD sessions if things start to get crampy...

i too get crampy and bubs goes nuts if i O. so for the most part i tell DH that i am after the intimacy and connection rather than aiming for the Big O IYKWIM. that way i can just relax and enjoy our closeness without worrying too much about ouchies post O. that said, sometimes the moment overtakes LOL! i reckon that once your past the implantation stage sex is just fine and perfectly safe...i am my own walking contradiction LOL!