Gnomestruck

in contemporary european lore, a gnome would go into a garden and pillage the crops and vegetables, and it would be said that if, in the night, as the gnome was searching, a torch would be shone on it and it would awestruck and freeze, eventually fleeing

“Bella saw Edward glimmer and was Gnomestruck.”

mental kink

Something that really turns you on in terms of creating strong positive emotions; Something you spend a lot of time with that you're mentally addicted to and give all your time to.

"Noah is constantly on the internet it's like he's never offline. The internet really is his mental kink."