Why would someone steal your dirty laundries?

I put my dirty laundries in a basket in our bathroom inside our bedroom which can only be access from our bedroom. I just changed and put my dirty laundries in the basket. The church youth came over and hangout that night. The youth leader was the only one who used the bathroom in our bedroom that night. Two pairs of my panties are missing from the basket and they were left on top of the clothes pile. The youth leader also left early that night saying he was not feeling well.

Why would someone steal your dirty laundries?
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