Maxim: Volenti non fit injuria

Maxim: Volenti non fit

Meaning: No injury is done to someone who has consented; it is a voluntary assumption of risk

Why to use it:

You know your boss has: (a) had a fight with his wife this morning; (b) cancelled his vacation due to work; (c) abused a demanding client over a call forgetting to put the phone on mute; and you still walk in to his office to negotiate your raise. He throws out your demand and you cannot complain – this is a classic case of volenti non fit injuria.