Horse riding

Checking antecedents...

An important politician was seen moving around with a film actress for a couple of months, with whom he finally decided to plunge into matrimony.
But being cautious, he hired a private detective for the job of looking into her antecedents and finding out if she had any previous affairs with men.
After a few days, the politician at last received his detective`s report, which went like this:
"Sir, this lady has a spotless reputation. Her past is clear; her family and friends all come from a very respectable background. No one has anything against her character. But yes, according to the grapevine, for the last couple of months she`s been frequently seen flirting with a politician with a dubious reputation."