Is this a reverse??
I shower most days, sometimes I go without at weekends but that's if I'm being lazy and deodorant / dry shampoo can cut it, and I'm only needing to nip to the shops or something. I enjoy showering though,and at 35 weeks pregnant I'm very sensitive to my own odour... I'm in for no more than 5 mins, 10 is a push if I'm shaving my legs (when I could reach) but I always feel better after. I don't think skipping the odd day or two is so terrible as long as your hygiene is up to scratch... washing hands is a must...
My DH on the other hand has to be prompted frequently, this and the gym membership he never uses have been the two main causes of arguments in our entire 5 year relationship. I don't feel I should need to remind him to shower... and when I do, it sets me on a spiral of resenting him for all the other things I have to remind him to do (wash dishes, check if we need milk, take the bin out) ... and it's infuriating. I mean he could happily go a week or more without, relying on lynx alone to survive. 🙄
So when he does actually shower of his own volition it's like a minor miracle. He doesn't actually hate showering, he spends half an hour in there, he's just a lazy bastard and he just doesn't think of it being something to do. I can't understand it, it's like this part of him never stopped being a teenager.
I knew this when I married him and I'm sure your DH knew the same. But why not surprise him. There is now nothing more attractive to me than my DH in a towel having taken ownership of his own personal hygiene ... lol.