Wow really that happened to your class? My class was more of the serious kind so I do not remember anyone being in stitches over anything. We were serious but then again we had good times in that class. But sex ed class for us was also mixed with the CPR class so we got CPR certified in this class although I never understood how the 2 classes combined made sense.
I never giggled during sex ed. I lost my virginity in grade 7 and we learnt about sex ed in grade 8. As well this was in back in Russia, so if you laughed in class you'd regret it.