I really did take 15-minute showers in high school, and I have no idea why it took me so long. I did wash my hair twice and shave my legs to the hip, but still.... After my mom told me that her leisurely showers took only 5 minutes (she could be in and out in 3), I tried to take a shorter shower, but it didn't work.
Unfortunately I also look like a mom, complete with stretchy pants and my hair in a bun every day. Oh well, I never was too glam anyway.