There's always going to be someone who thinks they know better and will challenge the beliefs of everyone around them. Take, for example, one man on Reddit, who told the subreddit "TIFU" (Today I F---ed Up) last month that he had messed with his girlfriend's diet and caused her acne to flare up.
"Mostly she swears that it cleared up her skin," he wrote. "From pictures, it seems she went from really gnarly acne to very clear skin."
Rather than take her word for it, the man, who said he's 24, decided to take the fate of his girlfriend's skin into his own hands.
He said he thought the acne might have been age-related, as your skin usually clears up as you get older. So to test his theory — and because he was "tired of all the vegan food," he said — he emptied her soy coffee creamer and filled it with dairy creamer for two months.
"She's a great cook but sometimes a man just needs some mac and cheese with cut up hot dogs," he wrote. "So I thought I would prove to her that the whole 'dairy gives me acne' thing is in her head."
However, his plan backfired. He said he never got to do his "big reveal" because he realized that since the change, his girlfriend's skin had been flaring up with acne.
Source : https://www.businessinsider.com/reddit-man-secretly-messes-with-vegan-girlfriend-diet-causes-acne-2019-5?bcmt=1