You know you can always count on French Montana to keep it classy!

Last night the rapper posted the above photo of girlfriend Khloe Kardashian's perky butt on Instagram, and he simply captioned the pic, "#asssscap."

Khloe and French have been dating for nearly six months now, and the duo are currently in New York where he's shooting his new music video for "Don't Panic."

So what's next for the couple? Apparently Khloe wants to have his babies -- stat! "Khloe's smitten," the insider tells Us Weekly. "and her goal is to get pregnant -- soon!" Khloe chatted with the mag at her birthday party at Tao in Las Vegas and added, "It's fun. I like how he's always happy. Smiles are infectious. They're contagious. I like that. French is just what I need right now."

And it seems like he has all he needs in the pic above!