No, not to go down on her (although that can be great too!), but to actually talk to your woman. There's no need to get dirty right away, just whisper in her ear. What should you be whispering? Well, that depends on your relationship, but such utterances as "I love you", "you're so hot", "your body really turns me on", etc. works very well in conjunction with other foreplay techniques.

You should always be experimenting with different touches, different kisses, different places and different "whispering luv gestures".