You searched for: “pygophilous
pygophilous (adjective), more pygophilous,most pygophilous
A strong fondness for buttocks or rumps: Chuck had an extreme attraction towards women in a the most pygophilous way, and therefore had difficulties in any lasting relationship with a nice lady.

Meg read about men affected by a pygophilous condition and having an unusual and immoderate fondness for sexy back sides of females.