Is it improper to hook arms for pictures?

It’s always been one of my habits to hook arms with people for pictures, unless they’re shorter.. for some reason I don’t like to hook arms with people who are shorter than me for pictures. Guy or girl, I would sometimes hook arms. So, at a graduation banquet for high school, is it improper for a girl to hook arms with a guy friend for a picture? Oh, and if it was a guy friend who I knew had a girlfriend, I wouldn’t hook arms.

It’s really been bothering me, and my mom already gave me heck, so let me know what you think! Please try to avoid using one word answers such as just a “yes” or a “no”.