I've been happily married for 4 years now but you know the old saying, what goes on tour stays on tour. Practically every trip I go on there's "fun" going on. As long as you accept this then yes you can have a normal relationship. At the end of the day it's just sex and when you're on a 9 day trip to the Far East and everyone's drinking and having a good time it's easy to get caught up in the moment
