Whats A little Sex Between Friends?

I believe that most people will say that sex can ruin a friendship, but i on the other hand feel differently. i have quite a few people in the friends file who i have slept and plan on adding a few more. Maybe its just me but the relationships have never changed even after the sex. i think its all about the person or persons who are friends. if their both on the same page and everyone is completely open about they're feeling and what they are looking for out of the situation than there is no room for error. i have seen this situation go bad and end friendships or at-least make people estranged. i say if sex is just sex or like i call it friends helping friends than there is nothing wrong with a little sex between friends. So every one get out there and enjoy your friends for all their worth