Doing the deed all wrong
Sex is usually pretty high up the to-do list on a couples getaway, so make sure you’ve got everything you need to start your trip with a (*ahem*) bang. In many countries, you won’t have as easy access to birth control as you do back home -- and even if you can find a pharmacy, good luck trying to mime out “prophylactic” in the local dialect.
So now you’ve got the kit, but don’t drop trou just anywhere simply because you’re on an exotic vacation. Make sure you’re on top of the local laws, as well as each other -- in some countries, the authorities don’t look kindly on PDA. Get a little too affectionate on a Dubai beach for example, and you might get handcuffed and locked up in jail for the night (and not in the fun way).
Skimping on privacy
A dirty weekend in a tiny hotel room sounds romantic, but it’s actually a pretty intense breakdown of boundaries -- especially for a new couple. For the first time, you’re basically obliged to spend 24 hours a day in each other’s company, and you’re finally going to find out if your partner does, indeed, poop like everyone else.