It was a little bit of a shock when I first saw two young men holding hands in the street. They were talking animatedly and one of them put his arm around the other one's waist and grabbed his hand with the other. I shrugged it off and continued on my way. I have since seen many men holding hands in the street--it is said that people who are very close friends express their closeness in this way. Similarly, when someone that you know well shakes your hand, he/she will frequently take your elbow with his/her other hand to show the connection between you is strong.
It seems that men in the United States are so worried about appearances that they avoid any sort of contact with their male friends, lest their sexual orientation be put into question (oddly enough, it is OK to be physical when drunk or when having fun tackling your friend to the ground).
Are you confident with your masculinity?