"Little Children" as recorded by Billy J. Kramer and the Dakotas, featuring lines like:
Little children, you better not tell on me I'm tellin' you
Little children, you better not tell what you see
And if you're good I'll give you candy and a quarter
If you're quiet like you oughta be
And keep a secret with me...
and especially:
You saw me kissin' your sister, you saw me holdin' her hand
But if you snitch to your mother, your father won't understand...
The whole thing comes off way creepier and more threatening than I hope was intended. That "your father won't understand" isn't all that far off from something escaped prisoners would say to threaten a kid who found them hiding in their neighborhood. The whole song, about running out of patience bribing the kids to shut up until he starts wishing the kids would disappear and take "a nap" just has the vibe of something Spike might sing if he was a drifter who blew into town and started putting the moves on someone's older sister.