Sometimes it's obvious a man is insincere and only wants you for sex. But some guys are smooth and full of charm, and can make almost any woman feel like she's the only one for him. In reality, he's hooking up with different women simultaneously, sweet-talking his way into bed with them. He's a player, otherwise known as a womanizer, a playboy, or simply, a douche bag.

Don't get sucked into his web. Dating expert, Tamsen Fadal, co-author of Why Hasn't He Called? and Don't Date Dumb reveals eight tell-tale signs that you're dating a player who's only out to add you to his harem. If he's displaying some or all of these characteristics, flee asap!

1. He has the skills of a pickup artist

If it seems like he knows exactly what he's doing when he approaches you, he probably does. "If you have done something so many times, you are very very good at it," says Fadal. He's mastered the moves and the talk because he's had so much experience at picking up women. Make your excuses and walk away unless you want to be another name on his list of conquests.

2. He confuses things about you

He still thinks you love Italian cuisine, even though you've told him you like Japanese -- twice. It's not his memory that's the problem here but his inability to successfully juggle the many girls he's got on the go. "Guess what? You're not the only thing on his menu," says Fadal. "If you're not just another item, he will remember every detail."

3. He's pushy about getting physical

Can't keep his hands off you on the first date? If he's a player, he'll quickly make his sexual intentions clear and won't be apologetic if you tell him it's too soon. His persuasion is more likely to come in the form of sweet talking and compliments about how much he wants you. Ditch all thoughts of building a lasting relationship with a guy who acts like this -- he isn't after any form of commitment. "A guy who really cares about getting to know you for the long haul knows that time will not be his enemy," says Fadal.

4. His Facebook friends are mostly attractive females

If a quick scan of his Facebook friends list reveals that he's mostly connected to good-looking women, it strongly suggests he likes to surround himself with females. Watch out if those girls are posting messages like "let's hang out", "missing you" or "hey cutie" on his wall. "His female friends are probably girls whom he can also sleep with at his convenience with no strings attached," Fadal warns. "Run before you become one of the flock!"