(pic via Passive-Aggressive Notes)
The pressure to perform on Valentine's Day is really high, okay? If it ends up being not so great, or not happening at all, your love is officially declared a lie by America and all the ships at sea, and you're under orders to break up and never speak again. So when you heard your neighbors going at it with a little more vocal demonstration than usual, it wasn't that they were trying to rub it in your face or anything. They were just so thankful that they managed to pull off some passable Valentine's Day SexTM that they had to shout (or groan) about it.