A fifty-something man walks into his bathroom, opens the medicine cabinet, grabs a bottle of Viagra, opens it, shakes out one Viagra pill, and as the pill falls into the palm of his hand, we hear the guitar riff from George Thorogood's "Bad to the Bone" play. Then we see the man strutting through his house and into his bedroom, while the song is edit to play the lyrics: "I make a rich woman beg, I make a good woman steal, I make an old woman blush, and I make a young girl squeal. I wanna be yours pretty baby, yours and yours alone, and I'm here to tell you honey, I'm bad to the bone." Then we see the man close the bedroom door behind him, and we see the slogan: "Viagra: Bad to the Bone," as the guitar plays some of the solo part of the song with the slide and such. And as a tag, we hear the line from the same song: "Every woman I meet, they all stay satisfied," followed by that famous guitar riff once more.
(I can't believe nobody has made this ad yet, so finally I had to write it up and post it here.)
This is George Thorogood's "Bad to the Bone":
https://www.youtube.com/watch?v=X9FyQNx8oyU