Exhibit A, from 1964 -- Dennis expresses what we all, not so secretly, would like to say to Mike Love. (Note brother Brian's look of mock horror.)
And Exhibit B, from 1965 -- a rough alternate mix (stereo, without most of the later double-tracking on the vocal) of Dennis singing Brian's heartbreakingly gorgeous "In the Back of My Mind."
This was Dennis' first big solo on a Beach Boys album (the great Today), and it's one my favorite things ever.
Seriously, when people tell you the Beach Boys were whitebread and lacked soul, make 'em listen to this.
[h/t Steve Schwartz]