Hunks of Hollywood: Watch your backs! Not since Warren Beatty has one single man wooed so many. Now, as Matthew Perry’s summer of serial dating winds down, Us uncovers the top 10 reasons why the Serving Sara star is so, so, so irresistible.

In the past months, Matthew Perry, 33, has been spotted noshing in New York with Rose McGowan, giggling at a party with Renee Zellweger, playing doubles with Jennifer Capriati at a celebrity tennis tournament, getting cozy with Amanda Peet in a Beverly Hills cafe, squiring Glimore Girls star Lauren Graham to dinner, taking in a movie with Heather Graham, smooching on-screen with Liz Hurley in their new film, Serving Sara and emerging from a closet yep, a closet- with a blonde at Hollywood’s Chateau Marmont hotel. So what does he have that other guys don’t? as it turns out, a lot.

1. He’s plain cute.
His eyes: “They’re so blue,” said Friends costar Lisa Kudrow. And the best part? He doesn’t know how cute he is. Said pal and writing partner Andrew Hill Newman: “He’s better looking than he thinks.”

2. He’s funny. Really funny.
What makes him attractive? His Whole Nine Yards costar Peet (they’re both in the sequel) put the question back to Us: “How much time do you have?” She insists they’re not an item but says, “He makes me laugh so hard that I’m sure I spit everywhere. Also, he’s, you know, easy on the eyes.” That again!

3. He listens.
“I used to have the dating problems,” he tells Us, “where you are just not really being yourself. I would be going out with this girl for, like, four weeks, and she would think I was really funny, but I would know absolutely nothing about her. I have learned to listen more.”

4. He’s sensitive!
He owns Barry Manilow’s greatest-hits CD. He cried during Men Don’t Leave. “Matty’s one of the most sensitive people I’ve ever met,” said Friends costar Jennifer Aniston, “more that most girls I know.” Matty?

5. He’s romantic (kind of).
He used to like quiet dinners by the beach. But I decided to stop doing that, because when I was 19, I took this girl to the beach not a smart girl and she looked out at the ocean, and she said, “I had no idea the ocean was this small.” How stupid is that?

6. He admits to having a girly laugh.
“I have this Alan Alda-like weird cackle if you really crack me up, it’s embarrassing,” he says. “It’s not masculine.”

7. He’s a good Friend.
ON opening weekend for Aniston’s The Good Girl, Perry was there in line at the Laemmle’s Monica 4-Plex in Santa Monica, California (with a guy buddy, for a change). He shelled out his $8.50 and even bought his own hot dog.

8. He won’t kiss and tell.
A ranked junior tennis player as a teen in Canada, Perry is mum on Capriati. He just happened to cheer her on at June’s French Open. And at July’s ESPY Awards. All he’s said? “Let’s just say I am playing a lot of tennis right now.”

9. He can handle rejection.
At the Lounge in Los Angeles, a Perry pal asked a woman on the actor’s behalf if she’d like to dance with his friend. She said no. “As a joke, Perry asked me himself, and I said no again,” the turner-downer tells Us. He said, “Not funny you should have said yes. that would have been funny.”

10. He’s gotten real.
“The biggest thing is happiness,” he tells Us. “If somebody is outgoing and if they are beautiful, then that helps. Somebody who�s walking through their days happy [and] makes me laugh is really important. Yeah.” Yeah!