Well, to me it’s because friendships are built on multiple shared interests and mutual support. When I get together with close friends, we talk about all kinds of different things- our hopes for the future, work, school, movies, books, music, travel, family, and our love lives. The reason the friendship thrives is because we’re well-rounded people. Sometimes we do talk about guys and lean on each other for support, but it’s a mutual give and take.
If a friendship has only one person talking about guys all the time- especially if it’s guy problems- then the friendship becomes all give on one side, all take on the other. Here’s an example from my life. A few years ago I was completely hung up over this one guy but couldn’t be with him. I thought about it all the time, endlessly hashed out various suggestions with my friends, and they offered me helpful suggestions but I shot them all down. Eventually, I noticed a few of them starting to avoid me or become frustrated with me.
Finally, one of my closest friends sat me down and said, “Look, asshole, here’s a wake-up call. You have to stop whining about him and find other shit to do. It’s making me sick.” It was pretty blunt, but she’d been patient with my wangsting for a long time. It caused a huge fight between us, but eventually I saw that she wanted me to be happy and healthy, and by constantly thinking about this guy I wasn’t making myself any happier or healthier.
The great part is, she helped me get my shit together and dragged me out of the house. I’m pretty grateful for that.
So it’s boring and frustrating for a few reasons- you have a friend who’s always leaning on you for support and talking about the same problems. It also gets to be predictable- I have another friend who’s had the same relationship problems for four years (her boyfriend is underemployed and unambitious, they live together and he won’t help with rent.) She isn’t willing to do anything to change the situation, so the complaints are always the same. I’m frustrated for her sake, because I want her to be out of this shitty situation one way or another.
If I’m hearing a friend out when she talks about guys, it’s not because I’m interested in guy talk, it’s because I care about my friend and I want her to be happy. Part of guy talk is that it helps you get through the problem and move on. If a friend has the same guy problem again and again, it means she’s not moving forward.