Marc Malkin

Miranda Kerr may be the face of Victoria’s Secret new fragrance, Heavenly Kiss, but don’t ask her who she’s been kissing lately.

Questions about boyfriend Orlando Bloom were off limits earlier today when Kerr was promoting the scent at L.A.’s Grove mall.

Then how about smooching in general, like what makes a good kisser?

“Chemistry,” Kerr said.

Okay, so what makes for good chemistry?

“I don’t know."

So much for that.

Kerr, however, doesn't mind talking about the self-help book she is writing. “It’s pretty much about nutrition and also about really treasuring ourselves as women and realizing that we really shouldn’t deprive ourselves,” she explained. “I mean, life is short so we should really enjoy it. And if we want something, have it in moderation.”

If all else fails, Kerr has chanting to fall back on. Kerr, a Buddhist, said: “I chant every morning and night. I find it extremely grounding and centering.”

Ah, that explains how she managed to deflect pesky questions about mack sessions with her A-list boy-toy without breaking a sweat.

—Additional reporting by Laura Lane