A couple of things to remember concerning Bruce playing piano on LSD-25 (the flip side of the Moon Dawg 45):
(1) Although drugs were certainly more prevalent in the entertainment industry than in society in general, most members of the general public didn’t have a clue what LSD was in 1959 – 60. The title would have seemed innocuous to most people back then. It would be five years later, in 1965, that LSD became a hot news item and topic of conversation, with such news and discussion exploding in 1966. And, it was still a legal drug at this point in time.
(2) Bruce did not write or title the song, and may have not even known its title when he played the session.