Im 59 and took a while to get used to the shorts also. After wearing the spandex I liked them and wore them all the time.
I road the C&O into Cumberland on a 95 degree day last summer and went in the train station to sit down and cool off. I saw the sinks thru an open bathroom door and decided soap and water would be great. While washing I noticed a lack of urinals and glancing at some feet in a stall quickly realized I may be in the ladies bathroom. Drying off I look over and saw a woman staring at me. I apologized and told her I had made a mistake. She grinned and said it was quite alright. Whew! I lucked out and now check the signs carefully.
The shorts and the ladies good nature saved a possibly embarrasing moment.