Some female penguins engage in prostitution; performing sex acts in exchange for pebbles –– However, sometimes the female penguin will just trick the male into THINKING they'll have sex, then run off once she gets the pebble.
Penguin
Some female penguins engage in prostitution; performing sex acts in exchange for pebbles –– However, sometimes the female penguin will just trick the male into THINKING they'll have sex, then run off once she gets the pebble.