Everything you know about sex is true.

Female marine snails living off the Perth coast in Australia are growing male sex organs on their heads after exposure to the chemical TBT.

sCurtin University researchers have revealed the snails are suffering from imposex, a condition that involves the development of a second sex organ after being exposed to the chemical.

Unlike garden snails, which are hermaphrodites, this species of marine snail has distinct sexes.

Hiromi Ozaki's alter-ego is Sputniko!, a Japanese pop star whose music, videos, performances and electronic devices explore themes of technology, gender and pop culture.

Hiromi is the author of devices such as the Pénis Cybernétique, a motorised penis which moves up and down based on her heartbeat and Crowbot Jenny, a dark-haired girl who goes around urban park carrying on her shoulder a crow-shaped robot that can communicate with crows and turn them into a bird army.

More than just a gadget, a video, a song, Sputniko! creates a whole character with its own manga-inspired aesthetics, attributes, super-powers and dynamics. Each of her projects has been produced in collaboration with scientists experts in Zoology, Medicine and Reproductive Science.

She received a lot of press fame recently thanks to her Menstruation Machine, Takashi's Take.

Fitted with a blood dispensing mechanism and lower-abdomen-stimulating electrodes (the same used by your uncle to muscle his abs while watching tv on the sofa, only that Hiromi maxed out the power of the contractions), the Menstruation Machine simulates the pain and bleeding of an average 5 day menstruation.

The machine could be worn by men who desire to feel closer to women and experience what they have to go through, but also by women when menstruation becomes obsolete in the future and the process becomes a mere ritual of gender and identity.

The artist made a music video to illustrate how and by whom the machine can be used.

The video 'Menstruation Machine - Takashi's Take' stars Takashi, a boy who builds the machine in an attempt to understand better what the girls he hang around with experience every month.

In her series, I'll Be A Beautiful Girl, photojournalist Ariel Zambelich follows 53 year old Rick as he becomes Elena, and undergoes Genital Reassignment surgery with the assistance of her/his ex-wife.

Via verve photo.

Via GayestEver.

A Selection from The Teen and Transgender Comparative Study, a windows solo exhibition by Charlie White, parallels two puberties: one biological, the other chemical/surgical. Over the course of a year, White worked to identify teen and male-to-female transsexual subjects who, when viewed together, would create a visual bridge between female adolescence and male-to-female sexual transformation.

The exhibition is on view in the Washington Square Windows 24 hours a day, 7 days a week until January 27, 2010.

Seen at the World Press Photo 2009 exhibition: Pep Bonet's portrait of transexual workers in Honduras:

Raul Coto is an occasional sex worker. He uses the name Gladis, and knows he is HIV positive. San Pedro Sula is the second largest city in Honduras and has one of the highest instances of HIV in the country. Transsexual sex workers are particularly vulnerable to infection. Conservative family and religious values mean that gays and transsexuals are often victims of rejection and violence.