UNLUCKY boys, it turns out women's favourite pens size is bigger than average.
The answer all men have been waiting for has finally arrived, as scientists discover the perfect penis size.
Scientists used 3D-printed penises to discover what women really want in the trouser department.
But it's bad news for the average Joe, as women prefer a schlong that is 6.3 inches long with a 4.8 inch girth for long-term relationships.
However, earlier this year British scientists revealed the average todger is only 5.2 inches in length and 4.6 inches in circumference.
When it comes to one night stands, ladies want someone with an even bigger trouser snake.
The preferred penis size for a single night of passion is 6.4 inches in length, with a 5 inch circumference.
The study, by the University of California Los Angeles and the University of New Mexico, used 100 plastic 3D-printed phalluses to conduct the research.
The research lead by Dr Nicole Prause, asked 75 female participants to choose which size and shape they preferred.
Dr Prause told The Daily Beast: "Women may prefer different sizes for different reasons at different times, so chances are very good any guy is someone's ideal for the relationship type they are seeking.
"To maximise the chances of receiving the sexual benefits it makes sense that women might prefer a larger girth penis that brings the clitoral glans closer to the friction point and also will stimulate the crura of the clitoris internally more.
"There is a cost with a larger phallus.
"All intercourse causes tearing and pushes bacteria into the vagina. A larger phallus probably causes more tearing and may push more bacteria into the vagina: not a good long-term option."
Of the participants who took part, 15 said they ended a relationship because there partners pecker was too small.
While five of the 75 dumped their former lovers because their schlongs were too big.