Teacher says to class, "Who can give me a sentence with the word contagious in it?" "Yes, Mary. Have you got one?" "Yes miss", says Mary. "Jimmy, down our road, has measles and my mum says it is very contagious." "That's very good", says the teacher, "Anybody else? Yes Siobhan, go ahead". Siobhan says, "I heard on the news that said that the latest corona virus is very contagious." "That's very good. Anybody else? Oh, right, Johnny. Have you got one for us?" "Yes miss", says Johnny. "OK, go ahead", says the teacher. Johnny says, "When we were having dinner last night, my mum said that the man next door said he was going to paint the front of his house with a two inch brush. My dad said that it would take the contagious."

that's funny

Is it funny because: cont/agious → cu*t + ages, or something else?

You know how a Computer is Always Asking You for a Secure Password.
Well I Wanted to Use a Real Hard Password,
so I Used the Word > INCORRECT.
And Now My Computer Says My Password is Incorrect.