Promiscuity (noun)

1. Indiscriminate sexual behavior, especially having many sexual partners.
2. Lack of restraint in forming relationships, friendships or sexual partners.

Origin:

From latin promiscuus "mixed, indiscriminate", from pro- "together" + miscere "to mix".

Examples:

1. The young man's promiscuity was a source of concern for his parents.
2. The actress's promiscuity was the subject of much gossip in Hollywood.
3. His promiscuity led to him contracting a sexually transmitted disease.
4. The young woman's promiscuity was the result of her low self-esteem.
5. The society viewed promiscuity as a moral failing.