"Talk Dirty" is a sample of the song "Hermetico" by the Israeli band "Balkan Beat Box" - one of the band members(Ori Kaplan) is credited as a co-writer and co-producer for “Worth It”.
I actually agree. And y'all, obviously he wasn't the first to have a saxophone hook in his song. They key words here are "started a trend". When Mr. Saxobeat came out, were there a bunch of clones immediately afterwards? No. When Thrift Shop came out, were there a bunch of clones afterwards? No. It was only after Talk Dirty smashed that all of a sudden all these songs with sax hooks in them were being released in a short period of time.