I am studying sexology.

Volunteer forces are people who voluntarily participate in relief activities.

Volunteers are always ready to help others.

Motherly affection is a special bond between a mother and her children.

The affection between a father and his children is very important in family relationships.

His sexual orientation is homosexual.

Sexual abuse is a serious crime.

Sexual intercourse is an important part of a romantic relationship.

They have sexual intercourse safely.

He believed it was love at first sight from the very first meeting.