Don't you just love that feeling you get after you have done something really kinky and dirty. The one where you think to yourself "I am the dirtiest pornstar in the world and I love it!" For me it usually comes after my GF has done me IDB with our big vibrator. That sort of burning tingling sensation that you get there coupled with the mental image of what it must look like to see myself take that whole thing all the way....... The best it ever hit me was my first experience with a guy. Just after he'd finished pounding my hole and pulled out to cum all over my back. Magic!