Corrected entry: Even when not referring to his own emotions, The Collector can't say the word "love" when he is trying to seduce Jeryline at the end. He tries very hard to say it, but is simply incapable of using the word. Earlier, when The Collector was tempting Cordelia, he used the word several times without issue.
Demon Knight (1995)
1 corrected entry
Directed by: Ernest R. Dickerson
Starring: Jada Pinkett Smith, Billy Zane, William Sadler, John Kassir
Revealing mistake: Brayker shoots The Collector through the eye with an arrow just after he's collected the key from Roach. You can see the section of the arrow shaft that sticks out the back of The Collector's head bend as his head hits the floor after he falls over the upstairs railing and crashes through the coffee table.
The Collector: Has anyone ever told you how beautiful you are? I know that sounds like a line - Lord knows I've used it - but I mean it.
Correction: He's more than capable of saying the word. He is simply having fun and toying with Jeryline at the end. Since he has the key and thinks he's about to undo creation he can afford to take his time. When talking to Cordelia, he is using the word to play on her emotions and 'sell' her on the idea of getting what's she's missing out, which is why he used the word. Also, you may not have noticed that he used the word love a moment earlier when he said to Jeryline "I know my folks are gonna love you."
dewinela