Different guys find different things hot/interesting.
Some like to see them degraded [sometimes, me]. Some like to see them corrupted [very much me]. Some like when the girls make fake noise [not me]. Some like it when girls are good at acting like they like things when they don't [not me]. Some like when they catch the girls being real [often me].
In the dead eyes you catch them "being real" in something they don't like, in something they likely find degrading. It's not really my thing, but I can understand.