Is liking Pina Colada means one is gay?

[question everything]

Just curious. I finished a book where there are two characters working together, a man and a woman. They are clearly devoted to each other know each other thoughts. And yes, after a disaster they spend a night in one room, nothing sexual. Just comforting each other.

But maybe? The reader wonders.

There was a disaster and they had to move to a hotel in the town.

The woman, the narrator is retiring early after a major injury.

But then a brisk rap-rap and her male friend is at the door.

"Do you want to come in?" I ask.

Slightly to my surprise, he shakes his head.

"Nah. I'm... well, I'm actually gonna go out. For a drink."

"With who?" I'm surprised. I'm even more surprised when he blushes.

"Eric. Landlady's son. He runs the bar up the road, said... you know. 'Come in for a drink after supper.'"

I can't stop the smile spreading across my face. "That's awesome. Is he...?

He replies: "If you mean, does he like pina coladas, sources say yes."

She replies: "Ha. Well. Go you."

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I am a senior citizen, do not go out much do not watch the popular TV shows and have never heard of this reference.. Sounds sweet, though.