Travis Scott -- Rihanna Let Me Touch It!!! (VIDEO)

Travis Scott is a real kiss and tell kind of guy ... or he's just under Rihanna's spell.

Scott had a show in Santa Ana, CA Monday night when he let the entire sold-out crowd know just how lucky he's getting with Rihanna. Scott cleverly switched up the lyrics to his track, "3500."

The original lyrics are, "One time for the trill bitches that'll let me touch it.”

But watch at about 13 seconds you'll hear ... "One time for the RiRi that'll let me touch it.”

This video ... combined with their recent make-out sesh at NY Fashion Week ... should convince doubters RiRi and Travis are the real deal -- or maybe it just looks like a giant PR stunt.