Burn!

Brad Pitt is so head over heels for MIT professor girlfriend of six months Neri Oxman, that he can't help shouting his admiration from the rooftops.

"He’s so attracted to her and he’s telling pals she’s the sexiest woman he’s ever met,” a source dished to Radar.

He's so smitten with his new lady love, it's making him slightly insecure that he doesn't measure up.

"In fact, he admits to the same pals that Neri might be TOO good for him. She’s so smart and he’s a little intimidated by that. He worries he won’t be able to keep up with her in conversation, so he’s feverishly brushing up on design and architecture to impress her," the source added.

This new love affair is making the actor's legal team worried that his ex Angelina Jolie could use custody of their six kids as a way to punish him out of jealousy.

“Brad’s team is extremely concerned how Angie will react now that he’s openly seeing another woman. After her unfounded claims that he was a child abuser, they know how vindictive she can be! Brad is taking a stand, but Angie is unpredictable — and there is serious concern that all the progress they made in the custody negotiations will go down the drain because of her fury over his new relationship. Brad’s team is absolutely terrified of what Angie will do now that Brad has found love first," the insider explained.

We'd pay to see Angie's reaction when she learns of all this!