I believe most spankings are embarrassing, but some are more than others.
I corresponded with a guy about 2 years ago who was spanked by his step-dad from age 8 until his late teens. He told be about one incident in particular, which made him feel the worst possible embarrassment (to use his own words). Let's call him Bryan.
Bryan's spankings ended after his 13:th birthday, at least that was what Bryan thought. He was a normal kid both physically and mentally, a bit small and thin for his age. He was blond and had thick hair which he usually kept by a length well below his ears.
However at age 14 he started loosing the hair on the top of his head, and at a very quick rate too. Well, lots of men do, although in Bryan's case it started at an extremely early age. This was the inheritance of his father, who was known to have been completely bald at age 18.
Bryan was visibly thin-haired by age 15 and had a bald look from age 16. He usually used a cap and in fact hiding his baldness made him look more like 2-3 years younger than he actually was. Of course Bryan had lots of bad feelings about his baldness, but some good ones too. It made him felt grown-up and wise.
Well, wise or not, one night by age 16, his mother and step-dad were gone for the night and were supposed to be away until next day. Brian invited 3 friends, 2 girls and one boy, all his age. After some time the decided going to town. It was a 1 hour walk, so noone really wanted to walk. Somebody suggested to take Bryan's step-dad's car, but Bryan had no driving licence and was reluctant to let Jimmy (the freind who had one) drive his step-dad's car. After all, he knew his step-dad would not have allowed them anyeay, even if they had asked him. However after a short discussion they persuaded Bryan to take Bryan's stepdad's car anyway and let Jimmy drive.
They spent some 3 hours in town and late in the evening they headed for Bryan's house again. Bryan's heart sank when he saw that lights were on in the house. Somebody was at home. Jimmy parked the car at the approach. Bryan's stepdad came storming and started giving Bryan the lecture of his life. Bryan's stepdad took Bryan harshly by the arm and led him inside. He told Bryan's friend to follow inside.
Then came the dreaded words... "You're in deep trouble, young man. I'm going to give you a spanking, right here and now". Bryan couldn't believe his ears. He had not been spanked for 3 years. He was too old to be spanked. He was not a child anymore. He explained all this to his step-dad, but nothing seemed to help. His pride was further damaged when his step-dad knocked the cap off his head, unveiling Bryan's baldish head, which made a clear contrast to his step-dad's haad, covered with thick but short-cut hair.
His step-dad continued to lecture Bryan, who was now feeling very humiliated. His face blushed severely and he was almost in tears. Then Bryan's stepdad went fetching a big oval hairbrush, then taking out a chair where he sat down. With a rapid jerk, off came Bryan's pants and the second after his undies too. Bryan's friends gasped and their eyes were focused on Bryan's penis and bare bottom. Bryan's stepdad then harshly forced Bryan down over his knee and the spanking began immediately. Bryan did not act like the adult he claimed to be, but it was more like a classic little-boy bare-bottom spanking ...Smack...I promise not to do it again...Smack...Please stop it hurts...Smack...I'll be good...Smack...
Bryan's spanking lasted for 10 minutes and left his bottom shiny red and blistered. His stepdad stood him up again and continued lecturing Bryan. To his horror, Bryan felt he developed an erection, which a minute later (father still scolding) was rock-hard and on full attention for all to see.
Bryan's father ended the lecturing by sending Bryan to bed and sending Bryan's friends straight home.
After this incident, Bryan's stepdad re-established spankings as part of Bryan's discipline. Bryan would get one blistering spanking about once every month until he got the last one at 19.