You can insert quite a long dildo but you must go slow. You have to get past another muscle group to get into the sigmoid colon, then if it's like about 18-20 inches (whew!) it has to go past another curve to get into the descending colon. This is possible if you go slow and use a LOT of lube, like J-lube for instance.
I think I could manage to work that up around the "bend" just under my rib cage and into the small colon. then the more rigid dildo would give me that "full feeling" I so much enjoy. I've been successful at inserting about 34 to 38 inches of soft rubber tubing up into my bowels and the feeling was GREAT !
You will know. Everyone is different. 6-8 inches depending on your size should be enough. The colon/intestine make a turn where it changes from the large intestine to the small.
Introduction to Depth Play. Squirrelmunk guides September 16, 2019. May 6, 2020. Roughly 7″ up your ass, you hit a wall. But it’s not a wall. It’s a bend. Your sigmoid bend. Most people don’t care about going past their sigmoid bend. Anal play is plenty fun if you stay in your rectum, so why bother going deeper?
I can take an entire 12" silicon dildo inside my butt. The first 7 to 9 inches is your rectun, then bends (I think to the left) into your colon. Now here you have to choose if u want to take an enema before having anal sex, or just do it natural...If you both choose natural, be prepared 'cause is he goes to deep inside you, he is going to start pushing back inside you "everything".
The rectum is a hollow muscular tube about 8 inches (20 cm) in length and 2.5 inches in diameter at its widest point. It extends from the inferior end of the sigmoid colon along the anterior surface of the sacrum and coccyx in the posterior of the pelvic cavity. At its inferior end, the rectum tapers slightly before ending at the anus.