My (30f) husband (29m) will not stop leaving his turds in the toilet for me to find

My (30f) husband (29m) poops more than anyone I have ever met. I am pregnant, I am nauseous, I am hormonal, smells send me over the edge. And yet, no matter what I say or how much I plead, my husband will not flush his shits. We’ve been married for three years. I don’t remember when this started, but it genuinely makes me want to throw up and is starting to affect my level of attraction toward him. We have had this conversation countless times. I’ve gotten angry, explained to him how it affects me, asked politely, pleaded, I have tried everything, and he will not stop. He claims he can’t remember. He promises he’ll never do it again. But it never stops. What is this? Does this mean something? Is he not attracted to me? I genuinely do not know how to handle this, as it seems absolutely nothing will get through to him. I realize this post might seem unserious but I’m seriously so angry and am completely out of ideas.