Masturbation (noun)

1. The act of stimulating one's own genitals for sexual pleasure.
2. The act of touching oneself sexually for pleasure.

Origin:

From latin masturbatio, from masturbari ("to defile with the hand"), from manus ("hand") + stuprare ("defile").

Examples:

1. It is normal and healthy for people to engage in masturbation.
2. Masturbation is a common and healthy way for people to explore their sexuality.
3. Many people engage in masturbation as a way to relax and release sexual tension.
4. Masturbation is a private and personal activity.
5. Masturbation is a natural and safe way to satisfy one's sexual needs.