You can't just couple date with anybody, can you?

I was talking to a friend today who is getting married soon (congrats!). Anyway, we were discussing maybe linking up after the wedding (couple get together). We started talking about our other friends that were getting married or who recently tied the knot. I mentioned that "I don't like everybody" meaning I don't like to just hang with or associate with couples just because they are "married". I think when your single you are free-spirited and you just want to have fun if someone is down to have a good time that's all you need. When you get married you don't want every married couple in your immediate circle. Why is that? I don't know but its true! My theory: A persons mate can change the dynamics of your relationship with them. Their mate isn't funny, witty or adventurous like your mate, they are boring, snooty, too serious, uptight or they just don't share the same interest. You may have to just hang out with your friend one on one. Not everyone can couple date... it maybe a disaster.