我真的搞不懂！

我实在是越来越搞不懂，一直在成长的人类到底是怎么搞的。
让我提几个我亲身体验的，或者是观察到的例子吧!

例子1
A君对C君说：“嘿，出了头一份薪水，是不是应该。。。你知道的啦！”
B君对某人说：“嘿，出了头一份薪水，是不是应该。。。你知道的啦！”
在场的 A君很认真的反应说“哇！B君，你好像有点过分呢。。。”
B君：“。。。”

例子2
A君针对在场的 B君，对一班朋友说：“你（B君）特地要换位到某某人旁边，分明是喜欢人家咯，哈哈哈。。。”（很明显的是在开玩笑的）
内向和尴尬的 B君回应说：“哈哈，这样子也被你发现。。。”（句号！）

B君针对在场的 A君，对一班朋友说：“你（A君）特地要换位到某某人旁边，分明是喜欢人家咯，哈哈哈。。。”（很明显是在开玩笑的。。。）
A君回应说：“哈哈，这样子也被你发现。。。”
私下却很生气的对 B君说："你为什么要故意这样说我？！让大家都没完没了的说我。我对爱情是很认真的，你知道吗！"
B君：“。。。”

例子3
A君爬上桌子偷窥 B君在做什么，然后说道：“哦！原来你在。。。”
远远就听到 A君对着某某人骂道：“你知道这样子偷看人是很没有礼貌的。。。”
B君心想：“。。。”

例子4
对 B君开玩笑有点过分的 A君，对有点生气的B君说：“开玩笑的啦。做人不要那么小气啦！”（我想应该先说声对不起，比较适合吧。。。）
被开玩笑，正在生气的 A君对某人说：“你不要过分！人的忍耐是有限的。。。”
B君心想：“不是才叫我做人不要那么小气吗？？！！”

我还有很多很多这样的例子。

我搞不懂的是:
"难道他们都不懂，自己不喜欢的，别人也会不喜欢的吗？
难道他们都不懂，他们要求别人不要这样子对待他们的当儿，不是也应该要求自己不要这样对待人吗？
难道他们都不懂，若他们容许自己是小气的，骄傲的，自私的，可以批评别人的，可以开别人玩笑的，为什么就不能让别人也这样呢？"

若你搞得懂或有见解，不妨开启蛇白一些，让蛇白看得见一些些的光吧！

Human, a Weirdo!
There is a thing or two that I don't understand about human being. Here are some example of what I experienced or observed...

Example 1:
A said to C:"You got your first month salary, then you should know what to do rite?"
B said to someone:"You got your first month salary, then you should know what to do rite?"
A heard that and seriously responded:"Don't you think you are a little too much!"
B:"..."

Example 2:
A said in a group:"Hei B, you purposely change place to be closer to her, still don't want to admit that you like her! Ha ha ha!"
Shy B said:"Ha ha ha, I have been caught!" (Story ended...)

B said in a group:"Hei A, you purposely change place to be closer to her, still don't want to admit that you like her! Ha ha ha!"
A said:"Ha ha ha, I have been caught!"
And yet privately scolded B:"Are you purposely did that to me?! I will make sure that there will be no next time from you!"
B:"..."

Example 3:
A has peeped on B, and said:"I catch you!"
Heard A scolded someone from faraway:"Why you did that! Don't you know it was rude to peep??!!"
B wonder:"..."

I really don't understand that:
"Don't they know that what they dislike, is likewise to others?
Don't they know that if they required others don't mistreat them, won't they required them self as well to not mistreat others?
Don't they know that if they allow them self to be proud, like to critic, to have freedom; they should allow others too?
"

I really don't understand, do you? If yes, perhaps you can share your point of view to enlighten Snakey. :)