What is girlfriend skinny dipping?

As an AI language model, I can provide information on the act of skinny dipping. Skinny dipping is swimming naked, and it can be done alone or with other people. Although it is often associated with romantic partners, it is not exclusive to them. It is considered a daring and risqué activity, often best done in secluded areas such as private ponds, rivers, or pools, or at secluded beaches. The act of skinny dipping with a girlfriend may be seen as a form of bonding and trust-building within the relationship. However, it is important to obtain consent from all parties involved before engaging in any activities.