What’s it’s like dating a gay person while being straight?

I’m sorry, what?

But also, I feel like the only non-joke-y explanation for this scenario is that the straight person is bisexual or fluid enough to date a gay person but is mostly attracted to the opposite gender enough to comfortably consider themselves straight. But I’m this scenario they come across that occasional person of the same sex they feel attracted to enough to give it a go. Which fan fiction tells me happens all the time.

But other than that I guess I just don’t understand the question enough to really give it a more well-thought out answer.