The "Born Again Virgin"...

I'll preface this story with the inescapable fact that I have no filter. I say things that I shouldn't on a regular basis. Trust me, this is in no way an effort to be mean or rude, it's just that I happen to say exactly what's on my mind, whether or not it is appropriate....and of course I don't care, it's just my reality.
So, one Saturday afternoon, some friends and I had been invited to hang at a girl's house down the street who was having a little get together. This girl is a tall, pretty girl with obvious fake boobs. Now when I see a girl with fake tits, I'm automatically assuming that she is promiscuous, after all, she did pay for fake tits for a reason, and if she weren't down to undress, why would she pay for them?
Well at some point during the day, the conversation takes a funny turn when someone says the word "virgin", so I -being not only mildly buzzed, but also more than mildly high- chime in and say to everyone in a facetious tone "I'm a virgin". Then I say to Cosmic Dave "you're a virgin too, right?"
"Oh of course" says Cosmic Dave in an equally facetious tone.
Hunter chimes in "and me too!", all of us trying to get a rise out of the party goers, who we see as our own personal audience.
A few seconds later, the tall, pretty, thin girl with the obvious fake boobs pipes up and says "I'm a born again virgin". Her comment got a good bout of laughter from myself including a "hahaha, good one!", followed by a few chuckles from my buddies (not sure if they were laughing her comment, or laughing at me for mocking her stand for celibacy), which was followed by a nice long awkward silence on the patio...then everyone went on their merry way conversing again and let it slide, so I forgot all about it.
You see, apparently she was serious. I did not actually get to the bottom of that until later on in the afternoon when she pulled me aside in the kitchen and scolded me for scoffing at her plea of decency in front of all her friends. At some point in her life (post-paying for her tits and likely showing them off to many people) she had a revelation and decided to become a "born again virgin". She told me she was upset that I scoffed at her statement, to which I replied "but it was hilarious!". Needless to say, I don't think we'll be invited over anymore.
Ya know, it's not like I was trying to offend the girl, I just thought she was chiming in on the same joke that we all were making about our sexuality. If that were the case, she would have been even more witty and clever than the rest of us to bust out the "born again virgin" joke...but she meant it, and it wasn't a joke at all.

Open mouth, insert foot
-S. Walling