Since puberty I have always felt dirty if I don't have two showers a day. Usually, I have a body wash in the morning and wash 'down there' with a quick rinse at night. I wash my hair on alternate nights.
I feel I need a shower to feel clean for the day and to be clean for bed after the day. I also feel it's important to wash 'down there' regularly if nothing else.
When I was living with my parents my dad would get very annoyed at me having two showers, even though the showers are about 3 minutes if I'm not washing my hair. Now I live with my partner, and he too thinks it's a waste to have two showers.