But a more discretionary system of side-payments is complex, and may be corrupted if one of you feigns exhaustion when in fact you simply fancy a glass of wine and a bit of TV.

• 但更加自由的单方支付系统将很复杂，而且如果你们中的一个假装疲惫而实际上只是想喝点红酒看点电视，这个系统很可能会破坏。