Dog sex may refer to:

• Sexual behavior of dogs
• Canine reproduction, a social behavior of the domestic dog
• Dog breeding, the practice of mating selected specimens with the intent to maintain or produce specific qualities and characteristics
• Doggy style, a group of sexual positions of humans
• Zoophilia, the practice of sex between humans and animals (bestiality)

• Dogging (sexual slang), a British euphemism for engaging in sexual acts in a semi-public place