Tell a joke that can make me laugh (especially one with a reward)

Today is my wife's birthday, so I work very hard. . I ate several plates of mung beans and soybeans to fight hunger before I went home. . My stomach is rolling in the middle, trying to vent. I stink all the way. . Before I went home to surprise me, my wife blindfolded me and I blindfolded myself. . When I got home, I sat in a chair and suddenly wanted to vent. . . . My wife's cell phone suddenly rang and she went to the next room. . I leaned against the wall and listened to it. . So I took off my pants to vent. Finally, I opened the window and put my ass out of the window for the last time. . Finally, all the cockroaches and flies in my house stink. . . Then I want to open the blindfolded towel. . But I didn't open it because I thought my wife wanted to surprise me. . . Then my wife came over and said, do you know what my surprise is? I invited all my classmates to my home. . Look at that. . The house is crowded with people, especially by the window. . Then they looked at me like Martians. . . . .