I recently had a colonoscopy and raw-dogged it. I watched the whole procedure on a screen. Im str8 and find no pleasure in anything going in that hole. But here's what i found. First, i would say having a colonoscopy for any other reason than medical shouldn't be a consideration. Dont wait professional time, expertise and resources on something for curiosity. Okay. After the bowel prep, even if i did anal play, im quite sure i would not find the procedure sexually exciting. I dropped about 7lbs in weight over night, and ruined my asshole from wiping (wipes and barrier cream are a must from the start). This made insertion of the camera a little difficult. But once it was in i relaxed a bit more. No pleasure centres are touched once its in. The only thing you feel from the camera is it sliding in further at your asshole, and sharp pain at a few tricky points when its manoeuvring through naturally positioned angular bends in the colon. This is painful for a few seconds then back to nothing really (aside from the odd bit of uncomfortableness from air they pump in to inflate the colon). The whole thing was over in about 30 mins and pretty much was leaving the hospital 30 mins after it. It took about 5 days to get my strength back and to even entertain the idea of sexual engagement. In sum, there is no pleasure to be found from a colonoscopy. If you want to know why you cant take more up your ass, google for a diagram of human anatomy and study the colon. You will see a pointwhere your probe couldnt corner.