What does the joke of donkey and tiger in the 60th issue mean?

It is said that there is a male donkey and a male tiger in the mountains. They are so hungry that they kill all the animals except them. Later, there was no way, and the two guys got together. The tiger discussed it and said, there is no way. Why don't we work together?

Hearing this, the donkey thought, Well, it's nothing anyway, so he said, Well, you are the king of beasts, so fuck me first.

Hearing this, the tiger was happy. To create an atmosphere, the donkey tore open his throat and roared across the valley. The tiger has never heard such a call to bed, which makes the tiger feel good. ...

After a while, the tiger finished eating, and it was time for the donkey. Without saying a word, the donkey worked hard. He worked hard for a long time, but he didn't feel angry. Donkey doesn't want to, so it's over. He came down and panted heavily as he asked the tiger,

"I said brother, you this is too boring, you fuck me, I in order to cooperate with you, that call, let you cool! But it was my turn. Why can't you be angry? It is cool and cool in people's hearts! "

Hearing this, the tiger wronged a face of tears and said:

"What's more, brother, when I say tears, I don't want to scream, but there is always something stuck in my throat, and I don't want to scream! ! ! "