There is the old cliché that opposites attract. Certainly Beatrice and Benedick are a fine example of this. They are bickering and feuding for much of the play but all this conflict holds back a flood of latent attraction. This type of conflict chemistry is said to be common in real life. I think the whole idea of the Madonna Hoer complex which Claudio suffers from is also imbedded, to varying extents, in western culture. The idea that a woman is virginal and pure until the man thinks otherwise exists even today. Claudio rebukes Hero at the slightest rumour of infidelity. When he finds out this was a lie, she becomes his Madonna again.