How do people shower at night?

Everytime I try to shower at night and wake up I just feel unhygienic in the morning. I don’t understand how people just get up, brush their teeth, get dressed and feel like they’re good to go. Not to mention hair. I get insane bedhead everytime I wake up, even when I tried to shower at night, so how do people deal with that? Maybe I’m just slow or missing something but it just feels so weird to me.