When you are in the right relationship with the right person , you both influence yourselves with good moral values , correct each other when things go wrong , learn from your past skirmishes on how to do things right for such misunderstandings not to re-occur.
But there something about relationships: you have an emotional sexual attraction! We are humans , it is only natural that these feelings are present. The temptation of wanting to be cuddled in his arms,with him holding you closely, and you, wanting a good night kiss… these are real things , you tend to face .
But even at that, you could choose to save the kiss for it to be special on that special day.