Relationships

How to comfort boyfriend?

I was just hanging out with my boyfriend and one of his friends and his girlfriend and the two guys were wrestling playfully to kind of show off to us I don't know why, but as my boyfriend was winning his friend hit him in the crotch. Obviously he crumpled and then the other couple was just laughing at him. He tried to hide it, but I know he was so embarrassed. How can I tell the other couple they were being incredibly immature and also help/comfort my boyfriend?
How to comfort boyfriend?
Post Opinion