“We all have closets we have to come out of,” says Christopher Ryan, the co-author of Sex at Dawn – and I agree with him.

I never had to come out of closet as gay, because I’m not. Oh, but wait! I can openly say I’m bi-sexual… But am I? I’ve found women attractive at times yet I’ve never gone all the way with any of them. I don’t tend to flirt with women but I like to have a look and let my imagination flow, if only just momentarily. And I am not the only one.

Lisa M. Diamond of the University of Utah has worked on a study about bisexuality for a decade and in 2008 after she had spoken to 70 women who identified as lesbian, bisexual, or sexually uncategorizable, she came to this conclusion: “Bisexuality may best be interpreted as a stable pattern of attraction to both sexes in which the specific balance of same-sex to other-sex desires necessarily varies according to interpersonal and situational factors.”

So that explains it. You can get caught in a moment. But what came first? My desire or was it the arousal of the moment? Stephanie Both and Mark Spiering of the University of Amsterdam revealed in their 2004 study about physical responses to sexual images that we get aroused before the desire comes and interestingly enough we are not conscious of it. But do women and men respond the same in a physical way? Emory University has studied eye movements and brain activity of their participants while they were looking at sexually explicit photos. I guess the result isn’t surprising – men are more visual creatures: they took their time looking at the faces in the photos more than women and had a lot more activity in the brain amygdala than women did.

What is your type? Do you like curves? Or really long legs? It just might depend where you are from. The International Body Project, a survey of 7,434 people worldwide, found out there is a catch. There is always someone on a diet.

In places with low socioeconomic status they love those couple of extra pounds but if you are part of high socioeconomic status you just might be into those skinny models. “Our results show that body dissatisfaction and desire for thinness is commonplace in high-SES settings across world regions, highlighting the need for international attention to this problem,” the researchers wrote.