Okay, here's the answer here, people:
If he didn't know where the panties came from, he'd be just as perplexed as Myway is about how strange underwear got in his laundry. He's a fucking cop, he'd want an answer to the mystery, it's in his nature.
He sure as shit wouldn't go, "Huh, well ain't that funny? You know I love you babe."
He'd go "Where the fuck did those things come from and how the fuck did they get in there?!" He'd be scratching his head, he'd be bouncing some ideas off his wife, he'd come home from work and tell her about how he asked a couple of buddies he'd pulled pranks on if they put them in his pocket to get him in trouble with his jealous wife.
The man is not wondering where the panties came from because he knows where they came from.