What do these two obscene jokes mean?

Tell two jokes first: 1. Men are children, women are mouths, and there are four brothers, four brothers, four brothers, four brothers, four brothers. ...

2. Teacher: Has anyone arrived? Monitor: I don't smell it.

The meaning of the joke: the first one: women have sex with men, and men have sex with women.

Second: Teacher: Does it smell like a vagina? Monitor: I don't smell it.

To put it simply, these jokes are a bit h, pun intended, and a bit obscene.