Why do we consider intimate interactions anywhere between people in an equivalent family ‘inc**t‘?

Why do we consider intimate interactions anywhere between people in an equivalent family ‘inc**t‘? The definition of inc**t comes from the newest Latin ‘inc**tus‘, shaped by the negation prefix ‘in‘ (not) and you can ‘castus‘ (chaste, pure) offering they the fresh new literal meaning of ‘perhaps not chaste‘ / ‘impure‘, deciding on all of that […]