The certainty of this plan's success is high.

I think this plan is highly practical.

The illegality of that act is clear.

Questions were raised about the legality of the act.

We need to check the relevance of this data.

He found it difficult to control his sexual urges.

No one should judge him for his sexual orientation.

A healthy sex life is important for overall health.

We learned about the importance of sex education at school.

This soap has antibacterial properties that prevent bacterial growth.