float hunger_rate = 0.5f;
    if( has_trait("LIGHTEATER") ) {
        hunger_rate -= (0.5f / 3.0f);
    }

    if( has_trait( "HUNGER" ) ) {
        hunger_rate += 0.25f;
    } else if( has_trait( "HUNGER2" ) ) {
        hunger_rate += 0.5f;
    } else if( has_trait( "HUNGER3" ) ) {
        hunger_rate += 1.0f;
    }

    if( has_trait( "MET_RAT" ) ) {
        hunger_rate += (0.5f / 3.0f);
    }

    float thirst_rate = 0.5f;
    if( has_trait("PLANTSKIN") ) {
        thirst_rate -= 0.1f;
    }

    if( has_trait("THIRST") ) {
        thirst_rate += 0.25f;
    } else if( has_trait("THIRST2") ) {
        thirst_rate += 0.5f;
    } else if( has_trait("THIRST3") ) {
        thirst_rate += 1.0f;
    }

    if( has_recycler ) {
        // A LOT! Also works on mutant hunger
        // Should it be so good?
        hunger_rate /= 6.0f;
        thirst_rate /= 2.0f;
    }

    if( asleep && !has_recycler && !hibernating ) {
        // Hunger and thirst advance more slowly while we sleep. This is the standard rate.
        hunger_rate *= 0.25f;
        thirst_rate *= 0.25f;
    } else if( asleep && !has_recycler && hibernating) {
        // Hunger and thirst advance *much* more slowly whilst we hibernate.
        // (int (calendar::turn) % 50 would be zero burn.)
        // Very Thirsty catch deliberately NOT applied here, to fend off Dehydration debuffs
        // until the char wakes.  This was time-trial'd quite thoroughly,so kindly don't "rebalance"
        // without a good explanation and taking a night to make sure it works
        // with the extended sleep duration, OK?
        hunger_rate *= (1.0f / 7.0f);
        thirst_rate *= (1.0f / 7.0f);
    }