That Thing That Thing That Thing...

U know that Lauryn Hill song where she goes like

"Girls you know u better watch out, some guys, some guys r only about That ThingX3"

So we pretty much have an idea what is That Thing in this context...

But when she flips it around n goes like

"Guys you know you better watch out, some girls, some girls r only about That ThingX3"

So i was just wondering...
That Thing in this context can take on several other meanings...
Why is it that???

Maybe I should really listen to the rest of the lyrics other than the chorus...
hmmm
*frowns n ponders*