Take responsibility through Pen

I noticed some of my students, at the age of 16, were still using pencil to write their notes and exercises. I immediately took some time to tell them this.

Me: "Why do we ask you to use pen to write in secondary school?"
Students: BLANK FACE.0.0
Me: "Is pencil just for kids to use?" "NO!"
Me: "But what's the reason we should use pen to write?"
Me: "Of course, in exams, you need to write using pen, so that the ink will last longer and it wouldn't be able to be erased by others. Ink is permanent."
Me: "It is also because ink pens create a permanent mark, writing using pen teaches us how to take responsibility."
Student: SUPER BLANK FACE! >.<

My explanation:
When we writing using pen, anything that we write or draw in permanent. We can try to correct it using liquid paper, correction tape, blank white sticker or cross out. But the point is this, there is a permanent mark that reminds us it was a mistake.

 But the thing is this, we shouldn't be too negative about this mistake. Instead, take it as a remembrance that we made a mistake and quickly learn from it. I took that analogy to remind them, as we grow up, we learn how to take responsibility.

Every action we take in life has a consequence, even when we write.