Complex sentence: Displaying the midriff and bare navel has been a taboo at times in Western cultures, being considered indecent, but it is more accepted today and in some societies or contexts it is both fashionable and common.
Split into simpler sentences: Displaying the midriff and bare navel has been a taboo at times in Western cultures, being considered indecent. Community perceptions have changed and exposure of female midriff and navel is more accepted today and in some societies or contexts it is both fashionable and common.