User blog comment:FallenShadow/Fallen's Reviews: Chapter 341-343/@comment-7397924-20130716041905/@comment-4829046-20130716042217

It was Natsu that said them but according to Nick's statement

"''The text bubble is pointing to Wendy's left. If you look at the pages before and after it, only Gray is standing to Wendy's left.

And one chapter ago he already showed that he lost any sense for taste or politeness in his verbal fight with Natsu, when he told Natsu to get covered in .... you know what.''"