In my younger years I used to share a house with some other mates. Things went great, they had their parties and fair share of women suitors. One lady, in specific, caught my eye (let's not mention she was a swimwear model at that time) but I never thought anything about it because she and my friend had stuff going on.
So about two years later in another town (an hour's drive from the previous) I was sharing a house with some mates again. One morning, as I was on my way out to work there is this knock on the door. I open.
o_O
There she was standing, in front of me. I was like, WTF?!
It turns out she had some stuff going on with one of my (now other) mates. That was very unsettling to say the least. Small world we live in.