It's not nice to discover you've been cheated on.
But one man has revealed how he discovered his girlfriend had been cheating on him, all thanks to the lover's fast thinking the morning after.
In a post to social media, the man revealed how he found a revealing yet clever note addressed to him hidden in a place his girlfriend would never find - under the toilet seat.
In a note to the boyfriend, the man wrote: "This chick just told me she has a boyfriend the morning after.
"Sorry to tell you like this, but I'd want to know if I was you. Sorry bro."