Consider yourself warned
Taurus
April 20 – May 20
"You're not funny."
Taurus uses humor as an icebreaker and a way to level the playing field. By cracking a joke (usually at their own expense), these bulls are creating an atmosphere of warmth and good vibes. Telling them their jokes aren't funny is like saying their entire method of human interaction is flawed. It will make Taurus defensive and distrustful of you.
Gemini
May 21 – June 20
"You don't know what you're talking about."
Um, yes. Yes, they do. Gemini is likely one of the most well-read and fully informed members of the zodiac and when they step up to the plate to discuss something, they're armed with facts. Questioning their intelligence will only backfire on you because Gemini also has a terrifying temper when provoked.
Cancer
June 21 – July 22
"You try too hard."
Basically, you're telling a kind-hearted, people-pleasing Cancer they're "extra." These sensitive crabs go out of their way to help the people they care for and by making them feel like their efforts were in vain, you're knocking them right in their soft underbellies. Also, they'll literally never help you again, so there's that.
Leo
July 23 – August 22
"You're not talented."
The quickest way to extinguish the fire inside a Leo is to tell them they're not good at something. Since this sign is hypercritical of themselves and sensitive to other people's judgment, they're not only likely to believe you, but feel like crap, too. If you want to give this lion sign constructive feedback, let them know what they do right before gently mentioning areas of improvement.
Virgo
August 23 – September 22
"You're crazy."
Do not poke at fire if you don't want to get burned. Virgo is an incredibly emotional sign that works hard to keep their feelings under wraps in order to function in the world. Calling them mentally unstable isn't just cruel, it hits them on a personal level and makes them feel judged, which is a surefire way to trigger an outburst from this occasionally hot-headed sign.
Libra
September 23 – October 22
"You're not that good-looking."
Dagger to the heart! Libra tries so hard to look their best every day and is incredibly sensitive to criticism about their appearance. While there are many things you could say to hurt a Libra, telling this passionate sign they aren't attractive is one of the absolute worst.