From what I have read the rectum is about six inches long to where it bends and the colon starts. With her seven inch cock I think she shoots her cum up into my colon and the colon can absorb through the lining. I know I rarely see or feel any of her cum leaking out of my ass.I think we’ve talked about this before. But it seems to me when my wife fucks me with her ejaculating dildo if she pushes in as deep as it goes when she cums there is way less drainage than if she cums shallow. In our play amount also is a factor. We have used three types of ejaculating dildos. The first you squeezed the balls to to cum, it was awkward but there was very little leakage. The second was a syringe type and there was a lot but it held a lot of cum. The third is a remote controlled and there really isn’t any but that’s probably because it’s in farther than the first cause you don’t have to reach down to squeeze. But sometimes leakage is the plan so she can make me experience cum dripping down my leg.