Today's "well, duh" research into the obvious:
Men's relationships with their female friends may be fuelled by an undercurrent of sexual attraction regardless of whether they are single but the feeling is not mutual, a new study suggests.
Women are more likely to consider their friendships with men as platonic and only hope that they develop into more if their own relationship is in trouble, researchers found.
[. . .]
Men - whether they were attached or single - were more likely to harbour an attraction to their female friends and want to go out with them than the other way around.
The men also assumed that the women were more sexually interested in them than they actually were - and the women tended not to realise this.
It was all there in "When Harry Met Sally," wasn't it?