it is fine yaar...that you had sex with already fifteen girls being single....but just think the other way...that your would be girlfriend/wife would be coming from the same background...and if someone gets the joy of promiscuity..it is really difficult to control/stop her...neither would you be able to trust her fully....ever.... now you would say that what is wrong if she has it too....or you don't care whatever she had before...man...sex is not only physical...the same fact would haunt you that your wife loves and cares so many people too as many she had sex with....that is a feeling....from which there is no escape....there is nothing special in having premarital sex...you can have it by paying money only....or going out with girls/boys like that....but the after effect is very terrible...when you get partner...you can never trust her totally....and that would give you a tremendous loneliness...make you feel constantly cheated.....which you can share with none....that's why people go for chastity...it is by choice that single people don't go for premarital sex...it is not lack of option which people like you think....