I had this one guy and a girl that I had just mad in CAS and moved in a house. They had just gotten the pink heart for each other when the neighbors came. So my girl greeted Dina Caliente and Brandi Broke(yes I'm in pleasantview) and then I told my guy to say good bye and he hadn't greeted them so he had never met these girls. And when he said good bye, he kissed them both!? Like when your sims do the romnatic kiss. It was that! I was like what the heck! Why did he just kiss them? Luckily the girl didn't react at all so i'm thinking it's a glitch. But maybe not. I don't know? Any help would be appreciated.

if he has 3 bolts with them, he will do it.

You can get rid of that with Squinge's Less Romantic Greet/Goodbye hack http://www.insimenator.org/index.php/topic,15058.0.html Requires Nightlife to be installed but is working with all EPs, including AL.

it is quite strange now, when a guy goes up to a granny and smooches her when they've never met, isn't it?

Haha! that is funny as hell. The greet smooch and goodbye french kiss doesnt cause jealousies.