Sexology is the scientific study of human sexual behavior and sexuality.

He is reading a book about demonology.

Eugenics is the science of improving human genetic qualities.

I like learning instrumental music.

He is a famous kapellmeister, and has directed many orchestras.

Physics and chemistry classes are very difficult.

He fractured his mandible.

Riemannian geometry is a field of mathematics that studies geometric objects such as curves and surfaces.

This shirt is made of chemical fiber.

He is good at drawing school AU parody manga.