Former 'That '70s Show' co-stars Ashton Kutcher and Mila Kunis have been dating since April of 2012, but they don't do too much in the way of PDA. So when they smooch or snuggle in public, it's a big deal.

The actor shared a snap of the couple smooching outside of Sun Records in Memphis, Tenn. But it's what you don't see that makes it such a cute and intriguing photo.

Kutcher, who recently officially divorced wife Demi Moore, posted the photo to his Instagram feed. We can only see his silhouette and that of the bun-headed Kunis, who was in a long relationship with child actor Macaulay Culkin before moving on with Kutcher. They are illuminated by the "SUN" sign.

But we can feel the love. See how his head is titled? So romantic. We can't even! Actually, we can. We can make out that they are in love while they're making out. Kutcher captioned the subtle, suggestive and sexy snap: "Sunset #nofilter."

What an impossibly good-looking duo, right? They are one of our fave celeb couples. The two attended the Florida wedding of Kunis' brother over the weekend.