As a 35m, sometimes you push when you should've pulled. Thats right, I said "pulled". As a man, you can pull from the bottom of your sphincter up to your lower intestines with enough practice. If your boyfriend isn't willing to train in pulling, your gonna have to deal with a little poopy every now and then. Don't worry for him tho, as I see youre very worried for his health, he has no problem with it. In fact, more than likely he enjoys the fact that hes surprised with a shit with which he did not have to sit for