Is it necessary for students to put on make-up? maybe there are opinions differ in dfferent people ,

Today,a graceful girl knocked at my dormitory room.I didn't  know what she wanted to do."Have you used the cosmetics? she said .i shaked my head. then ,she looked around our room and continued her topic ."I was so surprised that you didn't buy any cosmtics.Now most universities students are all learning how to make-up and have bought lots of cosmetics that fullfill of thier dawer,it is the best opportunity improves your skin.So why didn't buy it ?" I didn't answer her question,because i didn't know what should i say.

In my opinions, as a students,we should spend more time in our studying instead of making up .Making up not only do cost money also waste time .of course it isnot to say make-up is not important ,we can do it when we go to work or inteview.