I love that gif thanks for posting.
I agree, I think the fact that Gamora was probably the first woman Peter couldn't seduce straight away was at least 1 of the reasons why Peter was so fascinated and captivated by Gamora
there's just something about people who are more difficult to sway that makes them more interesting, by the time Peter saw Gamora for the very first time, he fell for her and boy did he fall hard for her!