I accepted Nylonjunge's invitation and take him for a short walk in Birkenstock slippers in the nice weather. By chance we both had the same model and we drove to a forest path near Braunschweig. Barefoot in the flip-flops and I in a dress - where he didn't know - that I wasn't wearing any underwear underneath. With the warmth, it is more comfortable for me not to wear a bra and panties. He also had shorts on and then we marched off. There were no cyclists or walkers on the road. We were alone in Birkenstocks.