Daughter: How long do boys erections last?

To this question from your 9 to 12 year-old daughter you could say:

“It varies. Boys erections may last for one minute to as long as 30 minutes. For example, boys often wake up with an erection and it goes down when they get up.

A boy can have lots of erections during the day and that can be embarrassing if he thinks other people notice.”