How do I stop my lucid dreams from turning sexual?

I have a lucid dream about every other month. I don’t use any techniques and they come naturally, and I really like the rate that I get them, they are a nice treat I guess. But the problem is that once I gain lucidity I almost always turn the dream sexual. I will use the lucidity to live out some kind of fantasy. That doesn’t sound like it’s necessarily a problem, but I often end up losing the ability to control the dream after getting carried away. I would really like to start having lucid dreams where I am more creative with my lucidity instead of just doing sex stuff. Any ideas how I can change this? Thanks for any help.