During sex with my wife, it seems that when I push harder or deeper that the result is some blood from her ends up on the head of my penis. She never feels pain or burning or itching ever and this only happens during sex and SEEMS to be when deeper or harder. I usually check during sex and there is no blood, but usually ends up being blood towards end or if I do it a bit harder. I am not huge size I am only 5.5 inches and average width but my wife is short and small and Asian and I wonder if her cervix is only a few inches up and I am hitting it and causing blood to come out. She has no other symptoms. It is usually not loads of blood but a spoonful or two or a bit more.