Bob finishes work early one friday afternoon, and decides to head straight home to see the wife. He’s at first a little perplexed when he can’t park the car on the driveway because a strange car is parked there, and then even more puzzled when he opens the front door and finds a trail of clothes — some belonging to his wife, and some he’s never seen before — leading up the stairs.

He follows the trail up the stairs, and once he’s halfway up, he starts to hear moans, gasps and the creaking of bedsprings coming from the master bedroom. He strides up to the door, and throws it wide open to reveal…

…his wife in bed with another man, with the pair of them grinding together, seemingly oblivious to his presence.

After a second, he gathers himself together.

“What the hell is going on here?”

His wife turns to her lover, rolls her eyes and says “See! I told you he was stupid!”