why do they show the same ads over and over on tv now

[c=7700B2][i]the adverts are terrible & ridiculous now but one thing i have noticed is they always show the same ads on repeat, i hate ads, hate watching them, but if i'm to watch tv and give it a go...i want to at least see some variation in the ads not the same ones with the same people with their annoying -ridiculous faces and expressions.[/i][/c]