President Donald Trump was delighted over milk on Wednesday, suggesting that the moo juice made him smarter.

Just before signing a bill allowing schools to serve whole and 2% milk, along with fat-free and low-fat options, in the cafeteria, Trump cut in, as retired neurosurgeon and national nutrition adviser Ben Carson emphasized the importance of dairy consumption for brain development.

“So milk would help your cognitive ability?” asked Trump during the Oval Office signing ceremony.

“Absolutely,” Carson answered. “You can tell who’s been drinking milk —”

“Taken cognitive tests,” interjected Trump, which sparked laughter among those surrounding the Resolute desk. “I’ve taken a lot of them.”

He continued with a smirk as he stared at a glass bottle of milk, “I’ve aced every one of them — because I drink milk.”

Trump has repeatedly bragged over the years about how he has “aced” such tests, including one where he was required to memorize five words in a row. Over the summer, he attacked Reps. Alexandria Ocasio-Cortez (D-N.Y.) and Jasmine Crockett (D-Texas) for each having a “very low IQ” before bragging about his “test” results yet again (many believe he was referring to a screening tool used to detect cognitive decline, not an IQ test).

Critics on social media mocked Trump over his comments, with one user noting that the “real question” is why the president is taking a lot of tests and another declaring that the brag “isn’t the flex you think it is.”