Now that you guys brought it up, I tend to snicker at Cat Stevens's -- er, Yusef Mohammad's? -- "Moon Shadow" line that goes, "If I every lose my mouth,
All my teeth north and south."

Come to think of it, while that's not a bad RHYME per se, it's got to be one of the most gawdawful lyric LINES ever written,

Unless Cat was deliberately trying to be silly, of course.

Oh, and another "serious" song I giggle through is Bobby Goldsboro's "Honey." Especially the part where she wrecks the car and, aw gee whiz, and
"I pretended I was mad, but, what the heck!
Guess you could say she saw through me and hugged my neck."

Just makes you wanna spit your beer all over the bar trying to keep from laughing, dunnit?