Not long ago, Jenny McCarthy was rubbing against trees in a way even the most staunch environmentalists would oppose. But these days it seems she's found an actual human being to molest -- namely, Justin Bieber.

The Biebs cleaned up at Sunday night's American Music Awards, and when McCarthy presented one of his honors, she grabbed him from behind and kissed his neck.

And from the resulting photo Jenny, 40, posted on Twitter -- along with the caption "Cougar rape?" -- it looked like 18-year-old Justin was being eaten alive by one of those 'Twilight' vampires.

If he was in pain, though, he didn't let it show, laughing and saying, "Wow. I feel violated right now." Because it's not every day a former Playmate uses your neck as a chew toy.

Later on, McCarthy confessed, "I did grab his butt. I couldn't help it. He was just so delicious. So little. I wanted to tear his head off and eat it."

Eek.

In light of that, it's probably a good thing Justin hooked up with Selena Gomez as protection after the show, causing Jenny to tweet, "My cub @justinbeiber brought his acceptable and beautifully aged beauty Selena to the AMA after party. Guess I'm back on the prowl. Rww!"

Too bad she didn't use some of her facetime with Bieber to talk to him about those ridiculous pants he's been wearing lately. Because dude. No.

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