Scientific evidence shows that dolphins are intelligent, sentient animals which means they can feel emotions like love and joy, but they also experience pain, fear, and suffering.
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There are dozens of photos and YouTube videos of grieflike behavior in dolphins: Some mothers have been seen carrying their dead infants in their mouths or on their backs for a week or longer, even as the body decomposes; a couple adult males have also been seen holding dead calves in their mouths.
Dolphins are very tactile and social. They show affection for each other by rubbing each other with their pectoral fins. When actual mating occurs, it is completed very quickly, with the two dolphins swimming belly-to-belly during intercourse.