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The original was posted on /r/todayilearned by /u/PM_Me_Some_Steamcode on 2025-09-25 17:03:23+00:00.

Original Title: TIL that some penguins engage in prostitution. Lonely males will amass a large collection of pebbles for their nest and females with a partner will come over to court the male. After the mating ritual the female penguin will leave with a pebble returning to her own nest.