Good question! Luckily for females it’s only a few weeks every cca9 months, for males it in theory can be more persistent due to different females in the area going into heat which then drives them “crazy”. The answer is the same though: increase exercise (both mental and physical) by 20%, decrease callout intake by 20%. Of course this is just an oversimplification and a “golden rule”, but simply put, you should try engaging the dog in a lot of activity as to burn off the suppressed energy which then comes out -as you put it- as horniness. The power calorie intake will down regulate hormones and helps drastically also in pseudo pregnancies in females post heat (also a natural process) .