Shauna to Bro: "Can You Stick It in for Me?"

Playboy pinup (and Lorenzo Lamas' ex) Shauna Sand got awkwardly close to her brother last night when they both sucked on the same saliva-covered "grill" outside of Koi in West Hollywood.

In true peroxide blonde fashion, Sand was totally clueless about how to use her newly purchased light-up mouthpiece (open mouth, insert grill?), exclaiming (like a star in a low-budget porno) "I can't get it in" and "can you stick it in for me?" Her brother then stepped in, took the spit-covered device and stuck it in his own mouth, and showed his dimwitted sis exactly how it's done.

Her bro's advice: "Don't bite it."