Old geezer smell comes from the pores, basically inside the body. Elderly tend to have weak bowel control and drink less as a form of control. Even wearing depends an accident must be changed immediately for not only odor but the natural acid irritates sensitive, older skin. Less water means toxins are not flushed which smells like geezer from senior pores. Don’t kid yourself, you’ll do it to because it happens in increments and you aren’t aware of it as such.
The ‘old people smell’ in a nursing home is similar to the ‘smell’ in a nursery full of babies. Ick to both.
Pee/urine.