i'm wondering if islam has addressed the subject of having sex. is there any book or guidance about having sex rightly considering natural or unnatural practices in foreplay?
Yes, there's book "Adab-e-Bubashrat" book where you can find islamic way of intimation. you can find it on this site as well. here's link http://pdf9.com/download-book-adaab-e-mubashrat-id-5752.html