He likes to take a walk in the park at dusk.

Cerebrospinal fluid plays an important role in protecting the brain and spinal cord.

I use mouthwash every day after brushing my teeth.

We should always remember the power of Kannon in difficult times.

Pre-ejaculate is a fluid that is secreted from men during sexual arousal.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.