Charlie, my Dad keeps walking into the house without knocking too and always seems to come in when OH and I are getting it on! The last time we had just finished and the door opened. Since he always either calls in or phones just as we are going to bed, we had said before we began this time - "what are the odds that Dad will come in?" And he did, so we had a major fit of the giggles upstairs while I jumped out of bed and threw on a dressing gown while Dad was downstairs calling..."Sue? Hello?" When he saw me in the dressing gown he was MORTIFIED...and I was unkind enough to tell him that we had just finished, and it wasn't the first time he'd interrupted either! He knocks now.
But my embarrassing story - a friend of mine and I were on teaching practice, and it was our last day, so we gave the kids a treat - rice krispie buns. When we got back to campus that evening, my friend turned around to say something and I said, "you've still got a rice krispie stuck to your lip, did you know that?" She gave me a look that withered me on the spot, and said, "Sue, that's a coldsore!" OH MY GOD I was so embarrassed.
Then years later I rang into a local radio station to tell the story of your most embarrassing moment, thinking that nobody who knew the friend would hear...I got loads of texts from that friend afterwards saying "i heard you on the radio!"
There was also the time my bro, his g/f and I were sunbathing in France. I had gone topless for the first time on that holiday and it was really unusual for me to see quite elderly women sunbathing completely starkers on the beach. A whole family were going completely naked next to where we were lying. My brother was lying quite close to the mother of the family when he looked up and then suddenly jumped up like a scalded cat. His g/f asked what was wrong and he blurted out , "You could park a bike in there!" The mother from the nudist family glared at him, got up and walked away!
He had just looked up from where he was lying and had been treated to a full view of her bits (or "beautiful Venice" as a colleague of mine calls it).
It was a full fifteen minutes before we stopped laughing!
Sue