What is when a guy lets you wear his clothes?

When a guy lets you wear his clothes, it can be a sign of trust and intimacy in the relationship. It can mean that he feels comfortable with you and wants you to feel comfortable around him as well. It can also be a gesture of affection, as he is sharing something personal with you. It may also be a practical solution, such as if you need something to wear and he has something that will fit you. Whatever the reason, wearing a guy's clothes can be a fun and playful way to bond in a relationship.