I think honesty is normal, and dishonesty is normal, too. Honesty sometimes comes from wisdom and understanding about the consequences of not being honest, but you do see people who have found a way to be honest in spite of dishonest influences around them. Having worked with criminals for the whole of my career, I have been surprised at how 'honest' some people have regarded themselves to be in most ways, except for the offences they have committed. For examples, burglars with strong boundaries about how you should treat children, shoplifters who wouldn't touch their family's belongings but will take from large supermarkets, child abusers who would not take a penny that wasn't theirs, domestic violence perpetrators who think it's alright to knock their partner about but are extremely polite and respectful to others. It's hypocritical to say 'at least I don't fiddle with kids' when they are victimising innocent shoppers queueing in a bank when a bank raid takes place' as these offenders don't realise the devastating impact they have caused with their actions. You hear these rationisations every day in a prison.
Humans seem to be naturally drawn to creating a pecking order to try and tell themselves they are better or worse than others. It pervades everything we do and brings us comfort. When we are not honest, the dissonance between what we aspire to be and how we actually are is dissipated by us telling ourselves and others that we do good and honest deeds, as though to offset the dishonesty. Humans lie, take things that belong to others (even if it's only that tiny cutting of that coveted plant in the gardens of a stately home that I pop in my closed umbrella!!), and we cause harm to others when relationships end acrimoniously, so we tell ourselves it's better to end it now than continue in a dishonest relationship pretending to be happy. We can't help but be 'dishonest' every now and then - we often do it to minimise upset or to cope with something unpleasant.