Cats like to sleep next to people or other animals because they feel more secure and warm. This behavior may also be an attempt to protect oneself from a threat. Cats are social animals and will travel together with other cats when living in the wild, so they have a strong sense of community and desire for interaction. Sleeping with people or other animals can help cats feel more closeness and belonging. In addition to feeling safe and warm, cats may sleep against people or other animals because they like warm places. Cats have low body temperatures, so they like to sleep in warm places, such as next to a radiator or under the covers. Sleeping next to people or other animals can help cats feel more warmth.
In general, cats like to sleep against people or other animals because they can feel more secure. and warmth, but also to protect yourself from threats. This behavior may also be because cats have a strong sense of community and desire for interaction. Sleeping with people or other animals can make them feel more close and belonging.