Good one! The "cause-a" part helps to reveal it. Pretty sure it's Monkey Time, by Major Lance.
Next, I liked this 1974 song:
It's plain to see you're all I need to satisfy me
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BTW - I, too, was surprised to learn that Desperado wasn't released as a single, but that's what Wiki and Songfacts both say.
Edit: The above sentence was meant to be in reference to the original version by the Eagles, although I can't find any evidence that Linda Ronstadt's excellent cover was ever released as a single, either. Maybe I just haven't found the right source, but I don't see it on the Wikipedia list of her singles, or on any of her other singles discographies I've come across so far, some of which list the flip sides. So...I dunno??
Anyway, Tony showed me that a Clint Black version was released as a single (thanks, Tony), and there were probably others. Sorry. I have to learn to be more careful when I use words like "never", which I did in my previous post.