Just because children ask questions about sexual behaviors doesn't mean they are ready to act. Children often want to know about their parents' life while they were growing up. They love to hear stories about your youth and how you resolved key issues. Telling your children about your life can often help them with their own struggles.
Personal sharing is a great chance to build trust and prepare for future talks.
Children need to feel safe talking about their concerns with parents and other trusted adults. It is okay for parents to have limits about what they want to keep private. If you do not feel at ease, you do not have to give specific answers. Your child may also learn to expect that you respect their privacy and limits. There is often a question behind the question, and it may be useful to understand the question your child really wants answered.