Tell Someone when they have Something on their Face i.e. Green thing, Make-up, etc.

I wish I had a picture for this story, but unfortunately I don't, so my words will have to paint the picture for you. I am in one of my classes and we are doing an exercise to get to know our peers better, so half the class is standing in a circle facing outward while the other half is forming an outer circle and facing towards the inner circle. Two question appear on the overhead, you meet and greet whoever is on front of you and after talking with them for two min the outer circle rotates one person. By the end of the class you've talked to almost everyone. During this process my eyes were watering quite a bit and were rather irritated feeling so I kept messing with them trying to make it stop as the circle continued to go around and I continued to meet more people. At one point I was talking to this girl, standing there rubbing my eyes as she watched with an interesting look on her face like she wanted to say something, but didn't. Little did I know that because my eyes were watering and irritated it had caused my mascara to make its way about an inch past each of my eyes. It looked as if I had 2 or 3 long spider legs coming out of each eye (a little scary, yes). After class as I was walked to my car, I started to realize I was receiving some rather unusual attention as people kept looking at me oddly. I then realized that the same thing had been happening throughout my entire class, as while I was talking to each person they seemed uncomfortable, or like they didn't know what to do. So anyhow I get to my car, only to discover these "spider leg" looking black lines coming from each eye. I thought, WOW thanks a lot guys for telling me I had stuff all over my face. I mean seriously, I talked to at least 12-15 people and not one of them had it in them to tell me a had black stuff all over me. WOW, wouldn't you want to know if you did? I think yes! So people come on tell others what you would want to be told, even if you've never met the person both of you will be better off! I mean seriously I always tell people if they have something on their face because I know I would want to be told so PLEASE do the same..It will make the world a happier place. Oh and yes, I have also been the one to have toilet paper follow me out of the bathroom on my shoe, dont' know how it happens, but do know I was the one who found it minutes later. No telling how many people didn't tell me considering I was at a restaurant.