Here's "Hang on to Your Ego", the original lyrics to "I know there's an answer" before Mike Love talked Brian out of using such druggy weird lyrics.
from wiki: "During vocal overdub sessions in March 1966, Mike Love objected to the possible drug connotations of the title and certain lyrics. "I was aware that Brian was beginning to experiment with LSD and other psychedelics ... The prevailing drug jargon at the time had it that doses of LSD would shatter your ego, as if that were a positive thing ... I wasn't interested in taking acid or getting rid of my ego."[1] As Love later admitted that he would actively refuse to sing some lyrics of Pet Sounds,[11] he reasoned: "[It] was too much of a doper song for me. So I came up with the alternative lyric, which reflected finding yourself. "
The Beach Boys always had a square side,
You can't tell me that there wasn't a huge drug influence behind "Vegetables"!