If you are trying to bag a man, then your best bet is to work your charm during winter and autumn, according to new research.
If the findings are to be believed, men find women more attractive during these seasons – possibly because the colder weather means fewer female bodies are on display.
The rarity of bare female flesh makes it more attractive to the opposite sex, the researchers from the University of Wroclaw in Poland found.
The study was carried out by asking a group of men to rate photos of women at different times of year.
On average, men gave higher scores during the winter and autumn than they did during the spring and summer.
Anthropologists working on the study said the effect of the seasons on attractiveness could affect men's choice in a partner and also their levels of adultery.
Reported in the journal Perception, 114 men were asked to rate attractiveness of women in photographs every three months over five seasons.
The photographs were of bare chests, the faces of young women and body portraits of women in black swimsuits.
In all, chests and bodies were thought to be more attractive during the colder months than in the warmer ones.
However, there was no seasonal variation when it came to judging women's faces – perhaps because faces are always on show and not hidden during colder seasons.
The phenomenon was found to be a universal thing among men, with no difference as they got older or depending on where they lived.
The researchers said: "As predicted, ratings of body and breast attractiveness were lower in summer than in winter. This effect may also contribute to observed behavioural fluctuations related to human male-female interactions. The effect we found might cause seasonally different levels of male assessment of female attractiveness or affect males' mate choice decisions.