The way I boost mine is by identifying which girls respond to sexual presence and which will disqualify you for having a sexual presence.
Use sexual presence on girls who seem more free spirited (drinks, tattoos, shows lots of skin, piercings, non religious, smokes, etc)
The religious book worms can be repulsed by it often and use it as a rejection pad.
Anyway, Avoid this shit:
[youtube]
http://www.youtube.com/watch?v=wbUpGoOjFWw[/youtube]
I mainly just use deeper vocal tonality and sexually charged words like wet, hard, sweating, lick, suck, and stuff like that when I'm in the seducer stages of communication.