The current study investigates how foreign language enjoyment (FLE), foreign language classroom anxiety (FLCA) and attitude/motivation (AM) of 360 learners of English, German, French and Spanish in a Kuwaiti university was shaped over the course of one semester by three teacher behaviours: frequency of using the foreign language (FL) in class, predictability and frequency of joking. Linear mixed modelling revealed a positive relationship between the three teacher behaviours and FLE as well as AM, but no significant relationship emerged with FLCA. Multiple comparison analyses showed that levels of FLE dropped significantly among students whose teacher joked very infrequently and infrequently. It thus seems that the absence of teacher jokes had a delayed cumulative effect on FLE. No interaction effects were found with time for FLCA and for AM. We conclude that teacher behaviours affect both AM and FLE, and that frequency of joking actually shapes FLE over time.