I've had two memorable non-compliments, both when I was in my early forties.
I had been conducting a choir and afterwards, a young male colleague said, "You know, from behind you look about only 18."
I replied, "You know what's really sad? You think you've paid me a compliment!" ?
The second happened when I was performing in a band; not the same person this time but he, too, was a younger male friend. He turned to the person sitting next to him and told her that the lad on the drums was my son. She commented that I didn't look old enough to have a son that age. His reply? "To be fair we are 40' away". ?
Clearly, 30 years on, I need to walk backwards and socially distance to the tune of 40' ?