Many times.
Starting in junior high school, all strappings/paddlings were administered by our P.E. coaches (they were the designated school disciplinarians) inside the boys' and girls' locker rooms. After showering (while still totally naked and wet), boys and girls who had been assigned to receive corporal punishment would have to fetch a strap and/or a paddle (they were hanging on the walls of the locker room dry-off areas) and bring the implement(s) to the coach. There were old decommissioned gymnastics vaulting horses in the dry-off areas of each locker room, which served as punishment horses. Although they were seldom necessary/used, there were even leather wrist and ankle restraints for helping a student to remain in position during a severe tanning (decades earlier, when my parents attended the same junior and senior high schools, these restraints were necessary when river willow switches were used to put up-to a dozen very angry stripes across very naughty boys' and girls' bare bottoms -- by the time I was a tween/teen, the schools were not using river willow switches anymore, but many strict fathers still used them at home).
When my parents were tweens/teens, the schools only had male coaches and it was considered acceptable for the coaches to monitor the girls' locker rooms and punish naughty girls (my mom once told my sisters and me the story of the time Mr. Burns put a dozen stripes across her bare bottom). By the time my sisters and I were tweens/teens, the schools had male and female coaches, and it was NOT acceptable for the male coaches to enter the girls' locker rooms. However, the female coaches did sometimes monitor the boys' locker rooms, and punish naughty boys.
When I was in the 8th grade (13.y.o.), I was punished by a very young and attractive female coach (she had a very petite and hard/athletic body). All of the boys were in love with her. She was a very fun P.E. coach, but she was very strict (especially when it came to corporal punishments -- she always used the wrist and ankle straps!). When I had taken off my P.E. uniform, as I was headed into the showering area, I saw that she was monitoring the boys' locker room that day. My math teacher had given me a pink punishment slip earlier that day, which I had put in the punishment slip inbox at the beginning of P.E. class, so I knew that Miss Ford would be punishing me when I finished showering. While I was showering, my penis became rock-hard erect. When we exited the showering area, into the dry-off area, Miss Ford was waiting for the three boys who were to be punished. All three penises were standing at attention! Miss Ford punished the other two boys first, then it was my turn. The other two boys had been given 5 swats each with the paddle. After Miss Ford pulled my pink slip out of the box and read (out loud) a description of my VERY naughty misbehavior, she told me to put the paddle back on the wall and bring her the thick/heavy senior strap (a razor strop usually reserved only for upperclassmen boys -- 15-17.y.o.). After giving her the strap, I had to straddle/bend-over the punishment horse, so now my erection was pressed up against the leather. She restrained my wrists and ankles, and asked me, "Are you ready to learn your lesson, Young Man?". I said, "Yes Ma'am", and the strap immediately set my ass on fire! And, even before the strap landed a second time, I had an explosive orgasm! The strap landed a total of 9 times, and I was a sniveling mess when Miss Ford released me from the restraints.
After being punished, students were required to bring their pink punishment slips home for a parent's signature. For most kids, this meant another punishment appointment at home. My dad had me fetch and peel a 4-foot stiff-but-flexible river willow switch. The next day, Miss Ford was again monitoring the boys' locker room. When she saw the dozen river willow stripes across my bare bottom, she said, "Well, I see that, just in case my whipping didn't teach you your lesson, your dad's thrashing made sure that you learned?!!?". And, I replied, "Yes Ma'am."