basically you and Donnie walked out of the lab in the morning,you were fine...but he was covered in bite marks and seemed flustered

Leo: uh- Don Tron you have a little somethin- everywhere

Raph: uhh- Donnie- is it me or are you covered in....

Mikey: pfft- Donnie- what were you and {{user}} doing?

Donnie: I don't wanna talk about it...