Washington, February 4: Scarlett Johansson has revealed that she believes in certain `unwritten rules' when it comes to dating and love in a technology driven times.

Speaking of her latest movie, "He''s Just Not That Into You", which comically chronicles the romantic misadventures of several individuals and communication between the sexes, the actress said that even relationships and love needed de-coding.

"If he really doesn''t call, I would say forget it," Johansson said. "I think that that''s the unwritten rule, is that the guy should call the girl," CBS quoted her as telling the Early Show.

The `Los in Translation' star further added that obsession over every message or text was also an absolute no-no.

She said: "I don''t like neediness in any way. Men or women. It''s nice to feel wanted and romanced and all that, but I need to have my time to do things with my friends and my family.

"So if somebody''s calling me too much, it gives me, like, anxiety. ''Like what''s wrong? What happened? Who died?''" (ANI)