Dog And The Child Friends

• Imaginary friend: a non-physical friend created by a child or even an adult. Sometimes they're human, other times they're animals like the life-size rabbit in the old Jimmy Stewart movie, Harvey. Imaginary friends are also created for people desperate for social interaction but are isolated from contact with humans and pets. It may be seen as bad behavior or even taboo (some religious parents even consider their child to be possessed by an evil "spirit"), but is most commonly regarded as harmless, typical childhood behavior. The friend may or may not be human, and commonly serves a protective purpose.
• Internet relationship: a form of friendship or romance which takes place over the Internet. Some internet friendships evolve into real life friendships. Internet friendships are in similar context to a pen pal. These friendships are also based on the thought that the other person that they may not have ever met in real life knows them for who they are instead of the mask they may use in real life.
• Mate: In the UK, Ireland, Australia, and New Zealand, blokes often refer to each other as "mates", for example, introducing a male friend as their "mate", or a circle of male friends as "mates". In the UK, as well as Australia, this term has begun to be taken up by women as well as men.
• Open relationship: a relationship, usually between two people, that agree each partner is free to have sexual intercourse with others outside the relationship. When this agreement is made between a married couple, it's called an "open marriage".