Negging is bad and you should feel bad if you do it.

Shit-testing is also bad and you should feel bad if you do it.

Conveniently, this is because negging and shit-testing are the same exact thing (being a dick and pushing to see what you can get away with). The reason that they're considered different is because negging is something men do and shit-testing is something that women do (though, interestingly, both terms were coined by men).