Final answer:
Contemporaneous bisexuality is the sexual orientation of a person who has relationships or engages in sexual activities with both men and women during the same time period.
Step-by-step explanation:
Contemporaneous bisexuality refers to the sexual orientation of an individual who is physically, romantically, and/or emotionally attracted to both men and women during the same period. This implies that a person who identifies as bisexual engages in relationships or sexual activities with partners of both sexes concurrently, rather than exclusively with one gender before switching to the other or maintaining relationships on the side while married. The concept of bisexuality recognizes the authentic experience and existence of attractions that span more than one gender.