So you know when you're in that situation where you left your home and for some reason the next home didn't work out for you to go to anyways, so you stay as a visitor somewhere else.
Then you meet someone online and they invite you to their home for Christmas and New Years. You don't have much else to do, or anywhere else to go, and the guy looks kind of cute, so you go.
Now we all know that Christmas and New Years involves a lot of alcohol, alcohol makes you crazy, crazy leads to "horizontal dancing," "horizontal dancing" leads to nausea, heartburn and many other things that are too gross to mention, and then when you least expect it you're pregnant...
(True story! Congratulate me!)