Dickgirl TG Thread

I've been looking for a manga for the past 3 weeks straight every night, and I can't seem to remember what it was called. The story was about a guy and a girl, and how this female doctor was doing an experiement and asked them to put this lotion on each of their skin, so they did and they bumped into each other and accidently transfered each others DNA to one another? If anyone knows what I'm talking about can you post the name of the manga. thanks!