If u tell your parent u like to suck dick/like to put dick on your ass, u r curse for them. Why r u thinking abu can keep about you too only.  
I sincerely sugget u not to reveal to yr parents if u r in Nepal. You can enjoy your sex life on your way, that's secret thing,  If u r palnning to maryy man, It is impossible yr parents accepts your man as your husband/wife in family.  Telling yr parents only avoid marrying girl, nothing helps more. U can avoid marrying girl in many ways.