So what did you end up doing? Getting mad (ranting and raving kind of mad) probably is not a good motivator. he's just going to tune you out or avoid you. You should explain to him why you are upset with his lack of participation. The subtle guilt trip is more effective. Use your passive-agressive skills.
Have you tried these Japanese Fruit tarts in Singapore?http://www.youtube.com/watch?v=Sb4WSIQS3ys
i don't really like fruits but N does!