At what stage is one bisexual "enough" to tick that box? I mean, surely many young people about town have been enthused either way in the course of their lives and might consider it again but if you are in a heterosexual relationship and likely to be for the rest of your life is it meaningful to identify as bisexual? Is that a characteristic in need of protection?

I appreciate that some people find this thinking deeply problematic and preemptive soz if you are one of them.