Essentially all CEOs of big companies have affairs and employ prostitutes. There are very few if any exceptions. Some hide their behavior better than others, some feel no need to do so. It's how 50+ heterosexual men behave if they have the resources to do so, and these guys have the resources to do so.

The consequence of this for security is twofold. First, compromising someone with sex is both much cheaper than compromising someone with direct payments of money and much easier to hide in an operational sense. Second, this is particularly so when the married mark's image (even sincere mentality) is one of rectitude and hard work and so forth.