And this is what happens during every live performance of their collab single, "Señorita":
And who could forget that video they posted on Instagram of themselves "kissing like fish", which was definitely a joke but still can't be unseen?
So when a caller mentioned Instagram PDA during Camila's recent appearance on Radio 1's "Unpopular Opinions" segment, of course Camila had a few things to say.
Responding to a listener who said "public displays of affection on Instagram are too much", Camila said: "Ouch. Well. I feel personally targeted. I feel personally attacked."
But when host Greg James pointed out people are pretty much constantly taking photos of Camila and Shawn when they're together, she agreed, saying it's "desensitised" them to the awkwardness of PDA.
"You honestly get kind of desensitised to it," Camila explained. "You're like, 'Well, might as well just make out on Instagram!'"
So I guess we won't be seeing a decrease in Mendes-Cabello PDA any time soon.
You can watch the BBC Radio 1 segment in full here: