Ahhh birthday spankings ARE fun!!! They always were, until I met my (now ex) husband and my best friends ( also now ex) husband. Ok, I lied, it was still fun! They just hit hard, but it was still all in fun. Clay, my friends husband is a mechanic, and he is very strong. He can lift car motors by himself (for real!). My husband was just very strong. I always enjoyed the birthday spankings (and sometimes they were for no reason at all other than being mouthy). They were not because of BDSM, because neither guy was into that, and neither were my friend and I at the time. If it was me getting them (and it usually was), it ended up with a big wrestling match, with them trying to hold me down and me trying to get away. I lost the battles, but it wasn't from lack of trying! It was always fun and we were always laughing.
Last year on my birthday, I wanted birthday sex from our Dom. At the time, we still all 3 played together, my friend and I and him. He made me count out loud every swat, and I had to remember in between what number he was on or I would get more. They were more painful than the ones I just told about because they were on bare skin and not through clothes. That was fun too, but a different kind of fun. I didn't get birthday sex this year because I had carpel tunnel surgery in both wrists this month, on March 8th and March 22 (My birthday is March 20th). My hands and wrists hurt to much still for any kind of fun like that.
As for being spanked in public, that hasn't happened since I was a little kid. I remember being hauled out of a grocery store and spanked on the bottom (probably bare) in my moms car. I had thrown tantrums in the store. It happened more than once. I probably got spanked IN the stores too! I still hate the grocery store, lol!!!