Not to step on any toes with an opinion, but, I think Uncle Pan just means that being bi isn’t quite as concrete as understanding your sexuality as fully gay, because there’s still the possibility, or even the nagging thought in the back of your head, that someone you can come to care for could easily turn to, more options? I’m not sure if that entirely makes sense, but, maybe it’s just an insight, for you? Into a different opinion, I mean.
To put it in perspective
if youre insecure and dating a lesbian - you know that you should be wary/cautious/jealous only when your s/o is around girls. Lesbians can have guy friends and its chill and safe
if youre insecure and gay - you know to be jealous around guys. Gays can have girls as friends and its chill and safe.
If youre dating a bisexual - everyone is potentially a candidate for you to lose your s/o.
As a gay man, dating a man who's openly bi can cause a lot of insecurities and concerns that he may one day fold to societal pressure or just feel the need for a "normal" family and leave you. This of course is my opinion and not a blanket statement about bisexuals, but it is the reason that they can be considered "wildcards" when dating or thinking of a long term relationship.
what does uncle Pan mean by being a bi is a wildcard ?? also whd does his beard disappear sometimes lol