User blog comment:FairyRaven/Fairy Tail Chapter 362: Natsu vs. Jackal, Review and Commentary/@comment-1839664-20131129234408/@comment-7418318-20131130092444

Unless the others are close friends, I'd feel equally embarresed no matter what gender they were.

And since FTGM's hint seems to have been too subtle: It's staff with A. Stuff with U are things, not people.