Yeah that's true. A large cock pumping balls deep into a man's rectum often stimulates his colon to make that shyt come down as a result of the pumping of big cock meat, lube , pre cum and air. Happened to me while getting fucked but thankfully the well endowed top reached a strong orgasm all the way up inside my hole and I had to get on the toilet and shut for almost an hour. It was cleansing and I was exhausted. My hole was sore as hell but the next day he came back wanting more ass. I absolutely refused but we know the power a top has over an obedient bottom because before I knew it I was on my back, feet in the air, crying and begging him not to take my hole again and he slowly and painfully worked that big cock into my stretched sore hole and fucked me nice and slow. I was literally crying out and holding onto his back as he slobbered my neck and worked that cock so deep that I reached an undeniable hands free orgasm as his curved cock high up inside stimulated my prostate to orgasm. I came twice despite having a very sore hole before he did and we collapsed in sweet man to man satisfaction but THAT time that cock didn't make me shyt. His cum flooded my hole and I couldn't stop shaking for quite a while. It was glorious beyond belief.
Fuck yes, when a man's large cock hits my hole balls deep and presses up against my bladder it often forces me to piss and brings me to a strong clamp down and pulsing asshole orgasm as I howl with often painful pleasure. The well endowed man takes what he wants and it's our duty as bottoms to satisfy their insatiable sexual needs. It's beautiful.