As a pastor it is vital that one seeks God through His Word, prayer, fasting and seeking wise council until you know what the will of God is concerning this subject. How parishioners conduct themselves sexually is central to their Christian lives and greatly impacts their necessary duty to obey and please God. It is a pastors duty to teach his flock the whole council of God.
The Bible is, upon careful study, very clear concerning sexual matters. If one holds to errant views concerning sexuality it is likely because for personal, selfish reasons one does not want to come to terms with truth.