pleasuring my boyfriend

when i pleasure my boyfriend, it usually is by giving him a handjob or blowjob. while giving him a handjob, i also grab his balls sometimes, and as im working down there, i kiss and lick his neck and kiss his lips. all of these things really turn him on and to hear him moan is one of my biggest turn ons too. but he told me that if i moan or say sexy things in his ear that it will get him off faster, but i dont know how to do the “sexy talk” stuff. what should say and when and how should i say it?