Could you show me your passport to confirm your identity?

She enjoys her sex life using a sex toy.

Gender discrimination is one of the social issues that needs to be resolved.

His toughness supports him even in difficult situations.

His work has various facets, and each can be interpreted from different perspectives.

It's difficult to understand his real nature.

Rabbits are herbivorous animals.

Owls are nocturnal animals, they are active at night.

This compound has high hydrophilicity, so it mixes very well with water.

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