I think I've figured it out.
It must go with the territory. The privilege of the rich.
The rich get bored.
Unless they have some sort of responsible structure, they spend a greater part of their life flitting away at parties indulging themselves. That's why we see so many in the news driving their cars into trees or doing time in rehab.
If you know you are stuck inside passing laws with a group of men and you have no social life, what do you do with your sexual urges? Why, that's probably provided.
Any men who have had brushes with the political leaders in their congressional district can smell it a mile away. the priviledge of the rich and powerful.