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.

Dolphins show affection and "love" through complex social behaviors that mirror human intimacy and companionship. In 2026, marine biologists emphasize that dolphins are among the few species that form long-term emotional pair bonds and "friendships" that can last decades. They display affection through tactile stimulation, such as "rubbing" or "petting" each other with their pectoral fins, and synchronized swimming, which serves as a rhythmic bonding exercise. They also use "signature whistles"—unique vocal identifiers—to call out to specific loved ones, showing distress when separated and joy upon reunion. Playful behaviors, like gently tossing seaweed or blowing bubble rings together, are also key indicators of a strong social bond. While we must avoid complete anthropomorphism, the neurological evidence of oxytocin release and their mourning rituals suggest that dolphins experience a form of social love that is fundamental to the cohesion and survival of their pods.