This is the single most unattractive thing men can do during sex

WHAT'S the worst thing a man can do in bed?

According to a new study, the answer is brag about his own performance.

It seems women are united in thinking that men who boast about their own sexual prowess are a complete turn off.

The new report, titled , explores how manly blokes feel after sex.

And it reveals that men can ruin the moment by boasting about their own performance and making a woman's orgasm all about them.

According the Journal of Sex Research paper, plenty of men base their own masculinity on how good they are in bed.

The study asked 810 men to discuss their sexual habits, and rate how masculine they feel after their woman climaxes.

And it emerged that fellas who are concerned about their own masculinity are more likely to base their self-worth on their performance in the bedroom.

The trouble is that the ego boost men feel after doing a good job is likely to just put women off, since bedroom boasting is hardly a turn on for most women.

This study comes after we revealed how long the average sex session lasts, with the surprise revelation about how many couples are capable of having a simultaneous orgasm.

In another sexual revelation, a sexpert recently revealed the truth about nymphomania, and the devastating effect it can have on relationships.