✔ 最佳答案
Sometimes you can't explain why something is stupid because there are just so many reasons it is stupid.
First, for the sake of making my explanation easier to read, let's talk about the two parts on an analogy. You have the source, also called the analogue, which, in this case is the wasp landing on you, and you have the target, which is the thing you're comparing the source to, which, in this case, is letting people into your heart.
Let's set aside the obvious flaws in the comparison, and talk about the flaws in the source, as a stand along statement.
"Allowing a wasp to land on you might be nice for the time being, but eventually you are guaranteed to get stung."
1) Most people don't consider it nice to have a wasp on them.
2) If a wasp is going to sting you, it is probably not going to land on you first.
2) If a wasp is crawling around on you and hasn't stung you, it is probably not going to sting you unless you provoke it. It is probably just going to fly away.
3) Even if you provoke it, it isn't GUARANTEED to sting you. It might be likely to sting you, but you can't guarantee your predictions about the behavior of a wasp. See dictionary entry for "guarantee."
--.~.--
Now, let's move on to the comparison.
You're essentially saying that every time anyone has ever let someone into their heart, that person has intentionally hurt them. That's ridiculous. Even if YOU personally have only had bad experiences with people, you have to acknowledge that there are plenty of people who have had positive, fulfilling relationships with other people who have never stabbed them in the back.
But more than anything, it is stupid because it makes you sound like a whiney emo teenager who likes to pretend the world is out to get you, and you may think your misanthropy makes you edgy and cool, but it really just makes you sound childish and pathetic. And if you insist on having that persona, so be it, but at least come up with more clever ways of expressing it.