This photo from the March 25, 1966 issue of LIFE Magazine has the following caption:

“A San Francisco mathematician takes a trip on LSD with his cat, who is on the drug too. He does this every other week.”

Rather presumptuous on the mathematician’s part to assume the cat isn’t already naturally high. Another case of human chauvinism at work. On the other hand, the cat doesn’t look like it’s freaking out. Still seems like a foolish and possibly cruel thing to do to an animal. How does one know how many micro-grams of acid to dose the cat? I guess it would take a mathematician to figure it out.

This reminds me of when hippies thought it was cool to blow pot smoke in the faces of babies. Aren’t babies stoned as it is? It sure looks that way.