The man talking is asking if the others would tell anyone if they were molested during a camping trip.
They say they'd keep it a secret, so the first man invites them to go camping.
The joke is that two of men basically agreed to be molested by the other man.
They say they'd keep it a secret, so the first man invites them to go camping.
The joke is that two of men basically agreed to be molested by the other man.