Sex is great!!! It sounds like you are having some fun. If you two are not using protection in the way condoms or birthcontrol pills the chances are that you are headed for a pregnancy. Question is this guy the right one to be nutting!!! So you would say how old am i? Do I want this nutting in me by this guy right now??? A very good question. Let your smarts and heart guide you (a little godly wisdom doesnt hurt either. Take care and good luck you will be fine either way