“Sex dungeon” financier Howard Rubin apparently doesn’t like it when he’s the one locked up, but his pleas didn’t persuade a Brooklyn federal judge who refused to release him on bond Monday.

The 70-year-old Wall Street multimillionaire is being held in the MDC Brooklyn jail after his sex trafficking arrest. His lawyers tried to make the case that he’s a devoted granddad who set up a ball pit for his young progeny in his living room, and would never use his wealth to flee the jurisdiction.

“He is a devoted and loving grandfather who goes above and beyond to create joy for his grandchildren. He dresses up in costumes — like characters from ‘Frozen’ — just to make them smile,” wrote his daughter Annalee Rubin, who submitted 15 photographs of Rubin with his grandchildren in her letter

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