I will have to burst the bubble right now by saying this entry is not even remotely close to something like 'Karma Sutra 101'. Right, just to make sure, in case the hot-blooded men and ladies out there get too excited about this.
By now most people should already know what heterosexual, homosexual and bisexual means, so let's focus on some of the -sexuals that were coined by people instead of words you'll find in Oxford's dictionary. Think you know all about sex?

Transsexual
Actually a proper word, a transsexual is a male of female who wished he or she was born of the opposite gender.

Metrosexual
Coined by Mark Simpson in the 90s. A metrosexual is a man who embraces the aesthetics. He is believes in good taste be it style, food or the arts. This is the urban 'image male'. Wordspy.com defines a metrosexual as a straight man who embraces the homosexual lifestyle. Which also loosely means straight men know nothing at all about style and aesthetics.

Ubersexual
Uber is German for super, but an ubersexual does not mean a man with superhero powers. This term that's barely a year old basically means a metrosexual who displays overtly masculine traits like confidence. I'd say Rob Thomas and Clive Owen make good examples.

Technosexual
The rise and rise of gadgets gave birth to the term in 2004. A technosexual is a man who is both tech savvy and style savvy. To make a slightly exaggerated example, a technosexual can be a man donning an Ermenegildo Zegna suit who carries a Dopod 818 Pro smartphone, Sony Vaio TX17 laptop and iPod nano with Bang & Olufsen earphones.

Pomosexual
The prefix pomo actually stands for post-modern, so as you'd expect this term was coined in the late nineties. What's a pomosexual, you say? He/she is a person who shuns labels such as heterosexual and homosexual that define individuals by their sexual preferences.

Retrosexual
Again coined by Mark Simpson in the noughties who made up metrosexual, a retrosexual is basically an antonym of M-sexual. Girls, use it to describe that boyfriend of yours who simply can't be bothered to spend money or time in his appearance and lifestyle. Save them, and unleash their potential, but don't make them nancy boys.

Pansexual
A person who will have sex with anybody. Basically horny with no sense of taste whatsoever.

That's all I have for sex. And I shall be nice and mention the definitions are courtesy of wordspy.com and urbandictonary.com.