Have fun gives rise to joy. Celebrate has a sub-event of have fun. Have fun has a sub-event of kiss. Pass your university exam does not have a sub-event of change channel. Have fun does not have a sub-event of change channel. Pass your university exam has a sub-event of celebrate. Have itch has a sub-event of person wear glove in winter. Someone want to be funny has a sub-event of person wear glove in winter. Kiss has a precondition of brush your tooth. Pass your university exam does not have a sub-event of speak into reciever. Kiss has a sub-event of sexual arousal. Date has a sub-event of kiss. Have itch has a sub-event of sexual arousal.
Pass your university exam has a sub-event of have fun.