Why is there a popular saying among freshmen at the beginning of school to "beware of wolves, beware of perverts, and beware of seniors"?

Senior brothers who are fire-proof and anti-theft-proof, and they love their families, their country and their junior sisters.

When you first enter college, there will always be a group of seniors who are trying to be courteous, such as bringing you things, treating you to dinner, etc. You have to be careful, because the purpose of these seniors is to make you their girlfriend. And junior girls are the best to seduce. Many girls just entered college and didn’t know anything and wanted to talk, so they just took the bait.

You have to be vigilant and don’t let sugar-coated bullets knock you down, elementary school girl.