Use "unadvisable" in a sentence

1. towards emission is unadvisable in the early stages of sex

2. “And the answer to my question, Zachary? Have you seen this woman? It would be unadvisable to withhold her whereabouts

3. If I do go it will be unadvisable for me to take her on this my first journey

4. In most cases, it is highly unadvisable to limit optimization system to only one utility function