LOLita: A Recurring Theme, No?

Watching Kubrick's 1962 "Lolita" and noticed some 
similarities in the Ennio Morricone theme to other tunes in 1956:

Goodnight My Love http://www.youtube.com/watch?v=DMK3R8ALK8s (listen to chorus intro)  

in 1960:
Stay http://www.youtube.com/watch?v=r9hSgs0ITI0 (listen near fade out)in 1962:
Lolita Theme http://www.youtube.com/watch?v=Upj2gDd6-7w(all throughout) What say you?