Since 1972, Reese’s peanut butter cups have run ads built on one gag. Two people collide. “You got peanut butter in my chocolate!” “You got chocolate in my peanut butter!”
The slogan sealed the logic. “Two great tastes that taste great together.” The candy itself was a 1928 recombination. H.B. Reese pressed Hershey’s chocolate around his own peanut butter filling.