If you don't want sex,you don't want sex.Now if you feel..."I'd LIKE to want sex,but I don't"....then, I suggest to explore with a T possible reasons and solutions.If you weren't 17...I might be a bit more open,but idk what's socially acceptable to say.I have 3 sons...no daughters.Another thing you may be interested in is being seen by a " Regular doc"...for a hormonal check to see that it isn't the cause.Personally the fact in itself ,at this point,is only notable due to fact it concerns you.Since after all you are not 'engaging & unable' just disinterested.It'd be like why am I not interested in salads.Well...it doesn't appeal.Every ones different.You mention that at 14 "it stopped".I have to wonder what if any experience coincided?Perna makes a great point.The opportunity hasn't presented itself so that you can measure your response.She mentioned chemistry too...( includes comfort with the person,spark of interest/attraction,emotional need...ect.)Each person has a formula per se.Nothing paranoid in questioning.Practicing on yourself is healthy,and a good way to discover what makes you tick .Please ,if you have been harmed or perceived yourself as experiencing something which led you to be uncomfortable or hurt in regards to your sexuality.....speak up to a T or a parent if possible.~W~