Searching the elders for ticks probably, but I'm guessing you want to know the sex related punishments.
The most common one would probably be having to serve the elders. All apprentices are expected to do this, but you'd be given all of the responsibility for however long your punishment is.

Another would be being used as a model during anatomy and sex ed lessons for the other, usually younger, apprentices. If you're lucky your mentor just points out your bits. If not, you'll get publicly molested by your mentor and/or the other apprentices.