The sensation of him inside you filling you. Moving slowly, at first, in and out. Then the deep thrust or twitch just as he shoots his seed. It feels like an ocean wave inside, and the warmth of him filling me. The sweet tingly feeling inside. And just before he cums you feel him get a bit harder. Then the wonderful sensation of him cumming over and over again. Feeling him spray his seed against your insides. Tightening your arms and legs around him so he never ever comes out. Being his, giving yourself to him ... for his pleasure and yours. I love it! It is truly amazing!