Dolphins. In both Bottlenose Dolphins and Spinner Dolphins, animals of the same sex frequently engage in affectionate and sexual activities with one another. Sexual activity between female dolphins includes stimulation of the genital area by flukes or flippers, and a kind of “oral sex” in which one animal stimulates the other’s genitals with its beak. Sometimes female Spinner Dolphins swim together while one inserts her fin into the other’s genital slit.[i]

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