Don't Pinch the Heart) is a 1980 Indian Tamil-language romantic drama film written and directed by Mahendran.

Nenjathai Killathe is the debut film appearance of Suhasini, and the first major role for Mohan in Tamil.

Nenjathai Killathe was released on 12 December 1980, and completed a theatrical run of roughly one year in Madras (now Chennai).

Pratap, a photographer and distant relative of Chandrasekhar, comes to Chennai from Calcutta and meets Viji.

Viji accepts Ram's proposal and informs Chandrasekhar, who advises her to reconsider her decision as he feels they are incompatible.

Ram confronts Viji and asks her to clarify, saying he would decide the future course of action based on her reply.

When Viji is leaving for her new life with Pratap, she is further upset when Mala proudly declares that it was she who derailed her wedding with Ram by misleading his parents.

Post marriage, Viji is unable to accept Pratap as her husband and stays aloof.

Viji is unable to forget her past, and her indifference affects Pratap's creativity and work.

Ram says that despite his wife's disability, he tries to live happily with her and asks Viji why she cannot do so with Pratap, who is more qualified than him, instead of thinking about their past and the grouse of losing the life she dreamt of.

Realising her mistake of spoiling her present by living in the past, Viji rushes to meet Pratap at the airport and joins him.

[9][10] Suhasini, then a camera-assistant to Ashok Kumar, was spotted by Mahendran during the filming of his previous venture Uthiripookkal (1979).

During the making of Uthiripookkal, Suhasini used to visit her father Charuhasan, who was a part of the film's cast.

[10][11][12] According to Suhasini, Padmini Kolhapure was the original choice for Viji, but could not accept the role for some reason.

[26] Nalini Shastry of Kalki praised Mahendran's direction for portraying emotions by staying away from typical cliches of Tamil cinenma and also creating strong characters, calling Ashok Kumar's cinematography as poetic while also praising the performances of actors especially Suhasini, Ilaiyaraaja's music but found slow pace as the only negative of the film.