Also, if you're 18, you're old enough to drink in Europe, but don't let that go to your head. Don't get blasted drunk with strange French men in strange French places, and don't let anyone buy you drinks, as date rape drugs are as easy to come by in Europe as they are in North America. A sound way to weed out the good French Freddies from the bad French Freddies is by making up your mind not to fuck any Freddie the night you meet him. If he's cool, if he's into you, if he's a Freddie and not a Henry, he'll take your phone number and wait a day or two to get into your pants. At home or abroad, any guy who insists that he absolutely, positively has to fuck you that night is probably a scumbag, or has a girlfriend at home, or is potentially violent.
Seduction can quickly morph into pressure, which can quickly morph into violence.
French boys are foxy, I agree, but like foxy boys everywhere, French boys can't be trusted when they're horny. Finally, I assume you don't speak fluent French, so I've prepared a letter of introduction for you. Clip the following paragraph, have it laminated, and keep it with your passport. If you find yourself being romanced by a Freddie who doesn't speak much English, simply hand him this note. Services Secrets c'est qu'il y a bien une raison.