Post jokes

Please, can someone comment on this post to explain what satisfaction you get from joking about such serious issues?

My dad posted a picture of his condom challenge fail to his social media - it was a picture of me.

Did you hear about the homosexual letter? It only came in male boxes.

What has more letters than the alphabet? -- The post office.

What starts with e, ends with e, and only contains one letter? -- An envelope.