Use "straitlaced" in a sentence

1. Kid was as straitlaced as they come

2. The usually straitlaced, military man with the impeccably groomed goatee sat on the wall,

3. However, the always well-mannered, straitlaced military man wasn’t laughing

4. Paul was so straitlaced that he tucked his undershirt into his boxers before he went to bed at night