Is it abnormal behavior to look at porn on a daily basis?

Porn. If it interferes with daily functioning, relationships, or causes distress, then it is abnormal.
Pornography. This is a highly debated issue. Pornography can be harmful to relationships and consequently have significant negative effects. Additionally, if a person finds themselves obsessing about it and unable to function in other areas of their lives it is having a negative effect and consequently would be abnormal and therapy may be helpful.