Bart seems rather out of sorts. Must be his time of the month
Didn't you hear?
Bart was on a date, and when he took her to her door, she looked at him coyly and asked him if he wanted to "get naughty."
Bart's no fool. These opportunities don't grow on trees, especially when the girl has fat, shapely tits. "Oh yeah," he breathed.
The girl stepped back and yanked off a mask, revealing none other than Santa Claus himself! "You done fucked up, pal!" he roared.
Long story short, nothing but a lump of cat shit in Bart's stocking this year. Small wonder that he's so crabby.