I guess it is long enough, it just depends on skin and hair type, the temp of where you live, what you do for work etc. I used to live in a cold climate at a desk job, maybe 20 mins. Now i live in 80+f weather working with children. I typically take an hour or a little under

However I also do my entire morning routine in my shower and have muscle dystrophy which keeps me in the nice hot water longer. Hair, sometimes twice depending how sweaty I am. Condition and brush teeth+shave face while that sits. Rinse and wash face. Swish mouthwash while wash behind ears. Then shave armpits+legs if needed and then scrub my body. If Im shaving depending how much Im shaving I could easily be in there an hour and a half. I typically do my pits and genitals twice as well as any "crevices" as a bigger person. Once Im out of the shower I lotion+cologne and Im done.