Shit t-shirts say

I don't suppose this is really appropriate here, but over the last two days I've seen some curious t-shirts on women I passed during my commute to Korea University. The first was a young woman with her boyfriend whose shirt read, "I'm not gonna lie; I wanna get high", and was covered in marijuana leaves. The second was a little older and perhaps on her own way to work. Her shirt read, "Boys ain't nothing but hoes and tricks." I know there are lots of similar examples floating around on the Internetz, but these made me wonder. Do the wearers know what they say? Perhaps they do and wearing them (in pretend ignorance?) is their little way of being edgy.