TMI husband help⚠️

My husband’s been having a lot of problems on the toilet lately! He’s been bleeding when he poos. Like a substantial amount and he thinks it’s normal because he’s getting older( he’s 33). Anyway I told him to start eating better cuz he tends to eat fast food during the day at work, and I told him lesson his coffee intake cuz he drinks quite a bit of coffee. Well he listened to me for about a week and he had ZERO problems. But now he’s back to eating crappy and a lot of coffee. He forgot to flush this morning and I just see a ton of blood which is not mine! 🤢He’s embarrassed but I told him he may need a doctor if he won’t listen to me. Any advice or suggestions? Why would he even be bleeding down there?😷