signs of spermertorea

Many student In my school use to take miraa so that if it can help them to stay awake and read for a long time .
They didn't  know any other effect but it was happening to them most of  them especially boy use happening to see sperms coming out without them knowing and it was preventable.
One day when NACADA came to our school and teach about mirra effects,they mentioned coming out of sperms unknown as one of the effects.
This make the group to stop taking it and after some time,they become normal 

Location: bombo, Transzoia East, Kenya