My wife and I recently had sex in the bathtub a few days ago. Needless to say, she was making quite a bit of noise.
I thought my daughter, who is 5-years-old, was asleep that night. Apparently, I was wrong.
The next morning, my daughter asked me what the noise was last night and I told her it was my wife "singing". Now, my daughter can't stop "singing" in the bathroom.