When Final Mem was created, it was so sad because all it had was a mouth and it thought that there are so many Mitzvot that are done with other parts of the body that it can’t do. Mem’s teacher explained to it that actually, just with your mouth there are an abundance of Mitzvot that you can do. You can learn Torah aloud your mouth, make a blessing and drink Mayim (water) with your mouth, eat Matzah on Pesach with your mouth. Mem thought that was pretty cool, but was still not satisfied and wondered, what about the most important Mitzvah of Ahavat Yisroel (loving your neighbour as yourself)? Mem’s teacher thought long and hard, and said, well saying a kind word, giving thanks and encouragement and helping your friends with their homework can all be done through your mouth. Mem was overjoyed to hear that and from that point on Final Mem always made sure that only Torah, good and positive things came out of its mouth, and only letting Kosher food into it!