Cheekbones. Is there anything greater that can even begin to compare? Cheekbones are probably one of the main characteristics in many different ships and fandoms.
Exhibit A: Johnlock
Here you see John Watson attempting not to swoon over Sherlock's bone structure. Obviously, he is failing.
Exhibit B: Merthur
This isn't just a Merthur thing, but a Brolin thing. In this gif, Bradley James (Arthur Pendragon) points out that Colin's (Merlin) cheekbones are (and I quote) "kicking right off on this shot, mate." To this, Colin smoothly comes back with, " Are they? You liking them?" Typical seduction tactic using cheekbones.
Exhibit C: This Guy From "Game of Thrones"
Exhibit D. Maleficent
Exhibit E: Johnny Depp
Need I say more?
Exhibit F (last but in no way least): LOKI
Tom Hiddleston just OWNS THOSE BONES *drools*
So, there it is. Cheekbones just make people go...