Why does a guy friend get mad when you talk about another guy if he already has a girlfriend?

well if they realii love there gf culd be because they want everione to know that shes the best gurl Eva n dnt wnt u to tawk bowt any1 else n say that there beter than his gf...

n if they playin their gf culd b bcause they dnt want to miss out on all the @%!* u guys tawk bowt...

hope i helped:)