About 20 years ago, there was a teenage boy who was openly cruel to another boy who was possibly gay at the school in which I worked.
He would trip him when he walked by, make snide remarks, and although the other boy tolerated the badgering without response, I was sure it hurt him terribly. It made the other students uncomfortable but no one wanted to say anything for fear of being called the same thing....
I figured it was time for a common sense lesson for the mean kid when he backed off from the other boy and yelled out not to touch him. I liked him since he had a lot of spirit, and I admire that in a teenager, but he was mis-using it.
So, I walked over to him and told him to take my hand. He did. He looked up at me from his seated position and I said to just hold it for a while. Eventually, he was so uncomfortable that he asked, "Why am I doing this?"  
I asked him if by holding my hand he felt himself turning into a 42 year-old, chubby, married woman with three children.
He looked at me, startled, but I could tell he was thinking. Suddenly, he pulled his hand away, and said, "I get it. It won't happen again."  It didn't. I walked away, knowing the boy would not bother the other boy again, because he came to the realization through literal "hands-on" experience that he could not be "turned into" a gay person, that it is just the way things are sometimes. Both students remained tolerant of each other after that. Watching the mean boy become a more tolerant person will always be one of my most valued memories.
Kindest Regards,
Frinkie