Going on a vacation often means going to a place where the weather is hot and you don't know anybody. My girlfriend (and previous girlfriends) will wear clothes that might be considered a bit too revealing in our home town. Having her walk around braless in a cropped top and a mini skirt all day (or a very sexy short summer dress or something that offers a lot of cleavage) is very exciting. Especially if she goes topless at the beach or is the only one topless at the hotel swimming pool!
No wonder sex in a hotel room often is hotter than at home.
