My girlfriend always makes a big deal about doing something sexy for me

Sex advice from Suzi Godson.

Question: My girlfriend of four years makes it really clear when she’s doing something that’s “just for me”. She does it when it’s something sexual, even if it’s just putting on sexy underwear. I’ve tried to discuss it but she didn’t seem to get it. Should I just be grateful, even when she’s making a song and dance about her ‘generosity’?