My two cents: for a male, the most embarrassing would be to have to stand in front of your female spanker, who is seated in a chair in the centre of the room, while she undoes your belt and your trousers, pulls them down to your ankles, and lectures you. Meanwhile you are mesmerized at how sexy she looks with her hair all done up, in her tight fitting little black dress, and the intoxicating view of her very short-skirted lap, and pretty high heels. You blush furiously as your pants are being lowered and you know whats about to happen.
Making matters infinitely worse is that you are also scanning the room and seeing the very shocked but very smiling eyes of several pretty ladies who are witnessing your embarrassing predicament and relish in the knowledge of what they are about to see. They are all dressed in their sexy short skirts, party dresses, and high heels, and several of them have such teasing smirks on their faces. A few do an occasional hair flip and smile at you, saying something like "oh your poor little bare bottom is going to get it good now" or "oh I'm so going to enjoy watching this".
Your female spanker then directs you to lower your own underwear as a further act of submission. You let out a low groan hoping this could somehow have been avoided and that the last line of defense covering your vulnerable ass cheeks (and penis) could stay in place. But no. Your brief hesitation to depant yourself has annoyed your spanker and she might say "pull your underwear down NOW, or do I have to ask Cheryl to come over and do it for you?" Defeated, and blushing even more furiously at the thought of the prettiest lady in the room, Cheryl, who you've secretly crushed over for years, pulling the last bit of your modesty down and baring you to the delight of all the ladies, makes you snap back to reality and quickly yank your own undies down. This results in a several giggles, oohs and ahhhs, and victory clapping from the ladies.
You see two of them high-five each other with big grins on their faces. You can't get over your spanker's lap fast enough, but she makes sure you are on full display to all the ladies first. The blood that is rushing to your face is also rushing to other parts of your body. Despite being so ceremoniously bared like this, and royally embarrassed, exposed with the knowledge that you are about to be spanked in front of all these pretty ladies, your rising member betrays you.
To the ladies' amusement, it shows them how a naughty and embarrassed man is getting aroused as well. They are delighted. By the time you are over your lady spanker's sexy lap for your bare bottom spanking, you have already just about died of embarrassment. Now you're just hoping the spanking isn't too severe and that whatever impression your pretty lady friends have of you being a strong masculine figure, doesn't forever melt away as you fear you may soon be reduced to a crying, blubbering, pleading, naughty 'boy' with tears streaming down his face as his frantically kicking legs causes his pants and undies to fly off his ankles.
Your shamelessly bared bottom is helpless to stop the raining onslaught of sharply delivered, crisp, loud spanks from your strong, determined, sexy spanker, who seems eager to impress her friends with what she can dole out. Rather quickly your lilly-white, upturned moon turns turns an angry, fiery red in front of all these smiling, delighted and sexy ladies who clearly are enjoying an UPPER HAND! on you. Indeed all four of your cheeks are now blushing furiously.