Why do women think sex is a unmutual gift?

i rarely date now a days because usually when i do. women give me this your a great guy number. they have sex with me then by the 2nd or 3rd day of knowing me they want me to be a chauffeur for their friends or they want me to buy them expensive gifts. I've even noticed that some girls just assume im just going to fall into some place. its my fault for having sex so quick but i seriously think we should teach women nobody owes them anything in this world, the good part os your going to have someone who wants to give you the world one day. but i digress... when i speak up and tell them im not ready to i. e. put them on my phone plane, buy a car, take her and friends from place to place , or my most requested one... can you pay my phone bill? after a date or a week of knowing me... now ill be the first to admit im perfect i no way shape or form, and im not saying all women are gold diggers leeches etc... i just dont understand why women feel they can approach me so early with all these favors. I've been used so much in my life it just makes me want to erase you from my brain.
Why do women think sex is a unmutual gift?
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