Its the Hypocrisy. And the con artist angle, thinking YOU are too stupid to see the obvious.
And for whatever reason, the Repubs FAR outpace the Dems in Hypocrites per capita
1) Rudy Giuliani - moralizer with a mistress
2) Bill Bennett - The virtuous one rails against evil gambling - then turns out he's an inveterate gambler
3) Rush Limbaugh - Drug addicts are a scourge and you should lock them up and throw away the key - then he's found to be a hillbily heroin addict
4) numerous Family Values repubs getting caught having affairs, frequenting prostitutes
5) numerous anti-gay repubs turning out to be gay
6) the rightwing conservative ministers who preach against the evils of pornography and casual sex and then get caught having porno and casual sex
7) Dr Laura - prosmiscuity and cheating is BADDDD. then pics turn up of her being a promiscuous cheater
etcetcetc