Search Results: between two guys

So I have a friend that is a woman, and she’s in a committed relationship. I’m also friends with her partner. I’ve known both of them for almost 10 years. At any rate, last weekend we were camping, and he (her partner) had to go back a day early. Nothing happened between us, but some of my social circle disapproves of this. Stating we shouldn’t have camped together. We didn’t share a tent, we just had a conversation around the campfire. Afterwards we slept in different tents and the next day packed up. And drove home together. So my question is for both Girls and Guys, is this acceptable behavior for two adults?

This couple that I know.

Before they got together, they are always on their phones, even when they are hanging out with each other or with other people. Sometimes, the guy would randomly openly tease her and she would smile.

After getting together, they are still on their phones despite being next to each other (No, they are not playing the same apps or smt like that. They indulge in their own apps.)

I see some other couples do this as well where both partners are beside each other but using phones all the time, even when eating at restaurants.

It's like there is almost no communication between the two persons.

With me though, the girl can be communicative, so I don't think she is necessarily the quiet type, although it's normal for her to be quiet around new faces.

Has anyone been in such a relationship? Can this kind of relationship really work?