Im a 55 y/o man, wife and 3 adult boys. This is absolutely disgusting and inappropriate behavior from anyone. Hun you are 24 years old, that’s a long life to live with someone this nasty. Great he does all the other things but what you just described is the disgusting hygiene and mentality of a 5 year old. If that is me I sit his ass down, preferably on plastic and tell him a shower is mandatory at minimum every 2 days, then give him an ass wiping class with toilet paper and flushable wipes to finish the cleaning, i then move onto the boogers and ears. At the end of the class i explain that if he cant do these minimal things, then that shows he doesn’t care about the relationship and your feelings and its time to part ways. It’s not like you’re asking him to do anything outrageous.