He enjoys me flirting with him, but doesn’t flirt back or make a move?

He’s 47 and recently divorced so there’s a big age gap. But I called him “sexy beast” and he blushes, laughs and looks down and smiles at me… but at the same time he never makes a move or flirts back as such?
I know he’s not a prude because he has a dirty sense of humour… but I dunno.

He enjoys me flirting with him, but doesn’t flirt back or make a move?
Post Opinion