What did one cell say to his sister cell that stepped on his toe

My friend told me this joke the other day and she was laughing so hard she almost couldn't finish telling it, and by the time she finished we were staring there laughing our asses off like idiots. When we finally caught our breath, I was like 'It wasn't even that funny.' And then we continued on laughing for another minute or two while the rest of our friends stood there looking at us like we were crazy.

I said this to my biology teacher and she asked me to leave the class and think about what ive done

This really split them apart :'(

Bd

What did a cell say to his sister cell that stepped on his toes?

I don’t get it