What exactly does Zhang Genji's joke mean?

1. My girlfriend is a treasure. She sent me a chest photo and wanted to send a "like" as a compliment. One didn't pay attention to the past and sent a "good peace". . . 2, take the bus, next to a beautiful girl, because of sitting for a long time, the weather is hot, my sister and I are sleepy, watching her sleepy head keep burning down. . . I summon up courage: Sister, are you sleepy? Sleep on my shoulder. Don't tell me, this trick really works, sister is not sleepy at all! Today, a lovely female colleague called me fat. I said, "I'm not fat, I'm strong, all muscles." I don't believe you touched my arm. " After that, I tightened my muscles hard, and Mengmei said in surprise, "Wow, it's so difficult!" The male colleague next to him spat, and the lovely girl continued to look puzzled. . . 4. What's it like to find a fat boyfriend? He wanted to come and kiss you smartly, but his stomach pushed you straight back. . . 5. Labor and capital have to go to the toilet to see a doctor. I soaked in the toilet for a long time before I pulled it out a little. As a result, this damn toilet automatically flushes. . . I was really confused when I stood in front of the hospital. . .