"And it's ... another corpse! Wow! What will the next one have inside?"
In the 19th century, Britain was going through an extreme Egyptomania phase, and mummies became just another souvenir for travelers to bring home. They brought back possibly cursed ancient corpses like you'd bring back an "I Got Lucky in Reno" T-shirt. Eventually demand became so high that the locals began mummifying criminals just to sell them off as Pharaoh's cousins twice removed. Hey, you try being six days deep into serious mummy withdrawals; you wouldn't be picky either.
The parties were pioneered by noted mummy enthusiast Thomas Pettigrew, a distinguished surgeon and antiquarian whose corpse-poking festivities were sold-out events. But while mummy unwrapping began as scientific in nature, like The Learning Channel, it soon devolved into an ungodly freakshow that spat down the throat of basic human decency. Also like The Learning Channel.
They went from Reunification of Egypt's Middle Kingdom to Here Comes Honey Khufu.
It got so bad that guests would sometimes take devotional talismans, linens, or even bones home as party favors. Do you want the next six generations of your family to be cursed? Because that's how you get the next six generations of your family cursed.