If She Shows Her Teeth, You're Fucking Her Good
Many men are insecure or afraid to discover that the women they fuck may be faking their orgasms. There is one unmistakable grimace that a woman can't fake and that comes naturally: showing her teeth. If your female is showing her teeth while you're fucking her, you're doing it right. Learn how to identify that grimace in this video of Brazilian Fernandinha Fernandez.
