There is no definitive answer to this question as everyone experiences pain differently. That said, getting a tattoo generally involves some level of discomfort, especially when the tattoo is done in a sensitive area like the inner forearm. Additionally, getting a tattoo of a two-headed calf may be more painful than other designs due to the amount of detail involved. Ultimately, it is best to speak with your tattoo artist beforehand to get a better idea of what to expect in terms of pain.