I've never been so glad to be full-lipped.

Women see masculine-looking men as more unsuitable long-term partners but men with more feminine features are seen as more committed and less likely to stray, researchers said Wednesday.

Scientists at the universities of Durham and St Andrews came to the conclusion by asking more than 400 British men and women to make judgments on character after looking at digitally-altered pictures of men's faces.

The web-based test asked participants to rate the face for traits such as dominance, ambition, wealth, faithfulness, commitment, parenting skills, and warmth.

Men with square jaws, larger noses and smaller eyes were classed as significantly more dominant, less faithful, worse parents and as having less warm personalities.

Those with finer facial features, fuller lips, wide eyes and thinner, more curved eyebrows on the other hand were viewed as a better bet for long-term relationships.