The 23-year-old singer, who is dating Calvin Harris, has hinted she enjoys kinky role play in the bedroom and likes to please.
When asked about playing characters in the boudoir, she told The Daily Star newspaper: "When you have a partner you have got to do what they want. So satisfy that partner and they should do the same to you.
"Everybody has an imagination and can be a bit creative.
"But you keep it to one person... you don't want to be too generous."
The blonde beauty is set to hit the big screen in the adaptation of E. L. James' novel 'Fifty Shades of Grey' and admires her co-star Jamie Dornan who had wife Amelia Warner and his daughter - who was born in November 2013 - on set.
She added: "Jamie is gorgeous. And he had his wife and his kid on the set a lot.
"But that makes him hotter... an unavailable guy for me is a bit like - wohoo!"