I think Pink has it. Despite being in a group with him and other people he sees, you'll still ramp up your fantasies and imaginings so that you're more special to him than they are in individual. It will seem like the group is being conducted especially for your benefit (or at least, that is how I felt :-)

I had a divider in my head. The individual doesn't become or feel any less, if anything it becomes more intense because there's more "energy" being generated by the group work so the individual gets stirred up like a can of paint