can yawn infact to others ?

As I read your discussion, I remember a television show I saw when I was a kid. It does explain yawning. The experts actually approves that yawning is contagious. Like if I saw someone yawn, there's a tendency that I will yawn to. But they can never explain the reason behind this. What's funny is that while I am searching for an image of a yawning person, after seeing it, just a couple of seconds I yawn and whenever I think of it I yawn. I have been yawning 5 times in your discussion now. Let's see how many people will yawn after seeing my image.

Most definately! I caen be fine and see someone yawn, once may be OK, but if they yawn twice, it's over! I will start yawning too. So yes it really can infect others!

Yes, like the saying "laughter is contagious", so is yawning. I think it's been proven that it is contagious. Lol I know a lot of times if I see someone yawn, I will too. I think maybe it reminds our bodies that we are tired when we see someone else yawn. One time in one of my classes it was really cool because like 5 people all yawned one right after the other.