Most Helpful Guy
Wow, that's a really good question. Most men are put off by a girl (or a woman) who has a best friend that is a guy. The truth is; most guys can't get past their own fear with this concept. It's funny though, the fears vary widely. The most basic fear a guy has about a girl/woman with a guy best friend has to do with the influence of the best friend,
I once met a very attractive woman in a shoe store and we talked our way right out of the store and into the parking lot. We agreed to meet later that night and she told me that she was bringing a friend along. I said OK and didn't give much thought. She brought her best friend (a guy) with her and we hung out for hours. Later her Best friend told me in the restroom that she really liked me and was hoping that I could see her again. I told him I would and thanked him for telling me. We became very close for many years. And her Boyfriend was never against anything that we did together.
A lot of guys don't want to think about a woman/girl who has a guy best friend. But they are unaware of the advantages. If they were ever a best friend to a woman/girl, they would know how this could work in their favor. But since the concept is so foreign to them, their closed minds cannot be fed this wisdom.