I always think that if you want a relationship going on and get a long term.
The way of people get together and sharing things should not be always the same.
The roles can be change and the attitude is important.
Sometime as a father with a daughter, sometimes like a mother with a son, sometimes like a lover, sometimes like a couple married for whole life and sometimes, just like friend.
The ability about how to make a suitable distance in different situations in all the kind of relationship is important.
Distance make things better or worse, and it's all depends on your sense of propriety.