Basics of Negotiation:
1) Ask for the most that you want and more
2) Decide if the most you can get is enough
3) Agree to terms or walk away
Examples:
When negotiating your salary at a new job:
1) You want $60K a year
2) You ask for $75K a year
3) They offer at $50K plus a generous benefits package
When with a girl:
1) You want sex
2) You ask her back to your place
3) She gives you her number instead
4) You propose a date Friday instead of taking a number
5) She agrees
6) You take number
How not to negotiate:
1) Ask for less than what you want
2) Hope and pray you can get more
Examples:
When negotiating your salary at a new job:
1) You want $60k a year
2) You ask for $40K a year
3) They say okay
4) You missed out on $50K a year plus benefits
When with a girl:
1) You want sex
2) You ask for her number
3) She says okay
4) You have number but no date
5) She's clueless about your intentions
Of course, going for a number and escalating later is a viable option with women.
But that's called escalating, not negotiating. As a man, you must learn both. As a woman too.