I never give a gift for no reason. If a girl I have spoken to and spent some time with takes the time to show me that I am appreciated, and this does not necessarily mean sex, because this on its own is never enough, and never should be. And she has shown a continued interest in getting to know me and being with me for who I am, then I will have no problem with giving her a gift. The best thing to remember I think is treat others as you would wish to be treated. Gifts, sex and whatever else are at their best and highest value when they are given naturally.