Smaller and weaker bonobos often form pairs to defend themselves against stronger and larger male bonobos Female bonobos also show increased homosexual behavior during times of high tension and conflict 2 similar behavior is observed in bottlenose dolphins, acorn woodpeckers, japanese macaques, and even lions. Female dolphins engage in clitoral stimulation using snouts, flippers, or flukes, and male dolphins rub genitals and sometimes engage in penetration.
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