Sauna in Germany

Went to the German sauna this evening. Very nice. Sauna was nude and mixed, with bathing suits for the pools and the hot tub. Pretty uneventful (though slightly distracting), except for when I was trying to act casual in the nudy sauna, wrapped myself with my towel, stood up and really bonked my head on the short ceiling on the row I was sitting on while trying to leave. The women suggested something to the effect that my circulation was affected (?).