You may be missing my point, Steve2. Which was: Franz had the hubris to openly display slightly questionable conduct in light of the recent gay scandals which swept through Bethel and were quickly covered up.
Perhaps it is suggestive of sexuality. Equally, here was a man well-known for lack of interpersonal awareness; nowadays we might refer to some of his behavior as "asperger-like" - so completely wrapped up in his own private world of Biblical interpretation that "nurturing" human relationships never featured in his repertoire. Yet within this remote "personality" was an oddly open power display involving a spa and hand-picked "boys".
As I said, this kind of behavior within a repressed sanctum is excellent soil for speculation. I'm still not convinced the car was ever parked in the garage though.