Watching him masturbate + talking dirty

Ok so I actually enjoy watching my bf jerk himself off. It's a usual part of our sex lives. To help him get off he's usually fingering me while I'm fingering his prostate and playing with his balls. Sort of a sideways 69...

But he also wants me to talk dirty to him and that's where I get hung up. Because there's only a few things to say and then he tells me to keep talking. So then do I keep repeating myself? What can I say besides "I love watching you stroke your cock" "yeah baby, stroke your cock for me" "I can't wait to taste your cum" (I swallow when he starts cumming) and "faster, baby"?

After those, he wants me to keep talking. Yeah, I'm lost lol