"A Casual Look"

Yester-day, I listened to the two-albums-on-one-CD re-issue of 15 Big Ones and Love You.  I noticed that, perhaps just coincidentally, some lines in "A Casual Look" are identical to some lines in "I'm So Young" (from Today!).  Here's the second verse of "A Casual Look":

A soldier boy when he proposed

She said no; his face just froze

You know she loved him

But was so young

Can't marry no one

Can't marry no one

And here's the first verse of "I'm So Young":

I have a girlfriend; she says I'm her only one

We wanna get married, but we're so young

So young

Can't marry no one

Both end with "So young / Can't marry no one."  Furthermore, as I've noted before, in both, "young" is sung with a melisma, providing a sense of degree (for "so").

According to the liner notes of the respective albums, "A Casual Look" was written by Ed Wells, and "I'm So Young" by William Tyus.

"I'm So Young"

A couple days ago, I was thinking about "I'm So Young" and realized that in various points in the lead and backing vocals, "so young" is sung with melismas (I'm not going to go through and figure out specific pitches for every instance).  Musically, this provides emphasis and gives a sense of degree.

I also quickly referenced the version by the Ronettes, which predates the Beach Boys' version.  The lead vocals have this feature, but I don't think the backing vocals do.