Fascinating facts about men: every year, a ton of research is done on some of our favorite topics: guys, love, and sex. We culled a sampling of intriguing tidbits that should be on your radar.(A Cosmo Crash Course)

Men never fail to confound us, which means we'll lever give. up trying to figure out things like what makes dudes fall in love, how they get turned on, and why they say what they say and do what they do. Luckily, experts are also on the case, conducting studies and unearthing new insights into how a guy's mind and body operate. Take a look at this riveting, just- discovered info the pros have turned up. Remember, knowledge is power.

1 Men with elevated levels of testosterone might have trouble committing, because it suppresses vasopressin and oxytocin, chemicals that encourage bonding. Signs a dude has a high dosage of it:

[ILLUSTRATIONS OMITTED]

2 Fifty-nine percent of males said that they wouldn't pursue a relationship with a woman if their first kiss left something to be desired. As long as you have great chemistry to begin with, work these surefire smooching techniques.

Run your fingers through his hair, and stroke the back of his head. It makes the kiss sexy and exciting while still being casual.

To help you relax and be in the moment, close your eyes and touch your forehead to his, matching his breathing.

At the end of the kiss, very gently bite his lower lip for a fraction of a second. This sends the message that you want more of him.