I have a cool idea of spending an evening with my girlfriend and cheer her up if she comes home gloomy after work.

I will rent a comedy movie and invite her to watch it with me. And each time one of us laughs (s)he kisses the other one on the cheek. If both of us laugh at one time we passionately kiss each other.

The one who laughs least of all will have to think of a romantic idea of spending the rest of the night.

My girlfriend also has a few similar ideas to raise my spirits if I'm in a bad mood. We always try to be creative to make our relations last longer.