A question about facebook and youtube?

[Fin]

Hello,

Apps and facebook like to have connections, so it can let everyone that you know (and the app and facebook itself) what you like. It does that with spotify because it was linked at a different point in time, but it won't with YouTube, I don't think YouTube allows facebook to link with it, only Google+.

Basically, different apps (such as spotify) will ask you if they're allowed to have certain access to your facebook account. Normally, it's things like posting on your wall, but trusted apps will usually ask your permission before doing so, unless it's something like spotify, which spams everyone with what you're listening.

Certain apps will just (without your permission) post things like: "I just found out which celebrity I look like!" with some photo that you don't like next to Brad Pitt for example.