Dream about my friend and I naked and then having , what does it mean?

well in old times they used to say tha if u dream with a girl and u and her doin something and she ur friend or w,e or not even ur friend and u having a dream tha means before she went to bed she was thinking about u .. alse have u dream with some one tha u cant see thire faces or w,e and u dont know who it is tha means too some one tha u dont know was thinkin about u well thogh about u before they went to sleep ..