Lol! Those who say that talking and laughing is allowed don't realize that in most cases it acts as a "first step" towards what they don't allow. I have seen a lot of such people later extending their limits and say, " Hmm, well! only hand shaking is allowed along with laughing and talking as it is rude not to shake hands if any of them extends his/her hand while leaving after a good session of laughing and talking"
Then while the spouse is alone at home, any one of them (who used to laugh and talk) come, it would be rude if my spouse doesn't allow laughing and talking, while the devil is smiling and waiting for a mistake.
Then if any one of them hugs also (trying to be westernized) then they extend their heart a bit more, " Oh well! once in a while no problem with hugging if they are mature and don't become touchy freely...you know" As if there are sensors connected to one's spouse to indicate that after shaking hand did the current flow from the body or the mind sent a signal that don't let the current flow because s/he is like your brother/sister.
Yeah, that is what happens after we try to make rules of our own and not follow the rules sent by our Lord through His prophet and book.