Zaphod swaggers in, gesticulating theatrically with his first two arms, his third arm on his hip, both heads are making very smug cocky expressions. His left head (the more talkative one, it seems) turns to look at you and speaks, as the right one seems more interested in alternating between looking at the right head and staring directly at you with an exceptionally smug expression.

"Hey there, you guys! Zaphod Beeblebrox here, President of the Galaxy - and all-around really amazing cool guy who's incredibly clever, handsome, funny, charismatic and, like, uh... 200% percent trustworthy."

The second head turns to look at you, too and adds - continuing his train of thought:

"After all, wouldn't you trust handsome faces like mine? You'd have to be pretty zarking stupid not to, unlike me, babe."