1) Bitch who believes the "pleasure" of giving her gifts is its own reward and never gives a grain of respect in return.
2) Bitch who accepts gifts from people she does not like.
For this reason above, friends regardless of gender should never make any gifts for each other in any form including such simple as tickets for beer. The exception to this rule is for families and engaged couples. Thanks to this rule you avoid a birthday whore 99% of time.