A love maker is a person who can't bang anybody, but instead can only make love. Usually women are love-makers, but a male can play the part. For love makers, sex is fun, but a one-night stand is out of the question. They prefer to talk about their feelings and need the "mood" to be set. Sex can't be meaningless, it has to have emotion for them.
Adam: "So Ben left the party with Emily last night, but he wouldn't have sex with her cause he didn't want to have a one night stand and be 'that kind of guy'"
Ben: "Why won't he just have sex and stop being a love maker?"