You were curious about the feminine essence you had picked up earlier. After a second look, it did seem to move a little differently from the male essence. A little more free-flowing, a little more graceful. The pink gloop in the jar followed your finger as you traced circles in the glass.
You were suddenly curious about the smell of the gloop. Would it be feminine smelling? Chemical? Like nothing?
You carefully unscrewed the lid, unaware that the gloop was starting to drift around happily. As soon as the lid was off, you leaned in to take a whiff...
And the gloop shot out and hit you in the face! You dropped the cylinder in shock, the liquid that suspended the goo now slowly spreading on the floor - you tripped and landed on the floor. The pink goop seemed to flow and cover your skin and under your clothes. As soon as it covered your full body you felt some painful changes, your hips cracking, your nipples twisting. The whole thing was terrifying but was over surprisingly quickly. You had a feeling what had happened, and upon reaching up to your chest you could feel two warm breasts had grown out of your skin.
"Ah, great..." You muttered, your voice now more feminine and higher pitched.
You looked into your pants... you still had a dick and balls. You seemed to be a mixture of male and female -
Until suddenly you were wracked with pain again. Some green fluid seemed to be pushing out of your pores. It flowed out and as it did so, your physical stature shrunk and you could feel your cock and balls recede. Soon, you saw what you presumed to be your own male essence glistening on the floor. You grabbed an empty cylinder and scooped it in... For some reason it didn't seem to react like the pink gloop (or the other green gloop) did. Maybe it took some time to recharge, or maybe their was something special about the liquid? You weren't sure why this goop pushed your old masculine essence out but...
"Better make sure not to lose it." You said, your voice now completely feminine.