Jennifer Garner has an interesting theory why she wasn’t one of the lucky ones to be invited to George Clooney and Amal Alamuddin‘s beautiful wedding in Venice.

And it has to do with lice and body odor.

The mother of three shared with Jimmy Fallon during an appearance on The Tonight Show the challenges associated with having small children attending school.

“I’ve had two mornings in a month without kids home sick. Strep throat, something they call a ‘fever virus,’ another strep throat, and then this hand, foot and mouth situation, which you should really…you don’t want that,” Garner said, to which Fallon quipped back, “Ben Affleck is now banned from my show. He’s not allowed to bring hand, foot and mouth disease onto my show.” Garner replied, “He probably did.”

“That’s not even the worst of it,” Garner continued. “You could come home and get The Call from school. You could get The Call. It is coming your way! The Call is, ‘Hi, Mr. Fallon. Um, this happens a lot, so don’t freak out, but if you could come pick up Winnie. Your daughter has a very treatable case of lice.'”

Ben Affleck & Jennifer Garner weren't invited to George Clooney's wedding… this could be why http://t.co/ctD6Iwb330 pic.twitter.com/5009PMKoaD

— HELLO! (@hellomag) October 3, 2014

After one kid got lice, Garner said, “We all got lice. It’s making me itchy just to talk about it,” said the actress, while scratching her scalp. “This was years ago. It’s not right now. I’m totally fine right now.”

She went on to explain how the lice cure was executed for her family.

“They have people like the Lice Lady, and they come over and they comb painstakingly through your hair, and then they put something on your hair…It looks like the put Crisco in your hair but you smell a little bit like a mixture of sulfur and rosemary,” Garner explained. “And you do it everyday for a month!”

WATCH: Jennifer Garner says when she met George Clooney one of them had head lice: http://t.co/HArId8mFqF pic.twitter.com/TSsUDq232r

— NBC10 Philadelphia (@NBCPhiladelphia) October 2, 2014

And it was during this lice infestation that Garner met Clooney for the first time.

“Actually, the first time—the only time! The only time our family had this problem, it was a day I had been combed through. I was getting the kids happy while they did them and whatever. Ben had gone early and he’d showered. He came out and he said, ‘Hey, um, there’s a party. I wanna go. Let’s go.’ And I said, ‘I can’t. I need to shower.’ I mean, I’m in, like, cargo pants. I’m nasty in a thousand [ways]. He’s like, ‘Come on! I mean, we have a babysitter. I want you to come with me.’ So, I get in the car and I go with him because he acted like I was going to be high maintenance. I don’t ever want to be called high maintenance. I am not a high maintenance chick! So I’m like, ‘What’s the big deal? No one’s gonna notice,'” the star of Alexander and the Terrible, Horrible, No Good, Very Bad Day recalled. “We show up and the first person I see is George Clooney, and I’d never met George Clooney. I was kind of like, ‘Ah, he’s so handsome! Like, oh, my God!’ So, I see him and I walk up to him and I’m chatting with him, just trying to act like it’s cool…and I can see that he smells me, you know? But he’s trying to be polite.”

GASP! When Jennifer Garner met George Clooney, one of them had head lice: http://t.co/jwtjHAemxz pic.twitter.com/72BTtxftMw

— NBC10 Philadelphia (@NBCPhiladelphia) October 2, 2014

“So, anyway, people keep asking why we weren’t at George’s wedding and we were both ‘working’ but I think he didn’t want Licey there,” Garner joked. “He’s like, ‘No, we don’t need the Afflecks. We’re OK!'”