Mens Compression Shorts How Can I Ask My Mom For These?

How can i ask my mom for these? - mens compression shorts

http://www.roadrunnersports.com/rrs/products/BKW329/Mens_Brooks_Equilibrium_Brief_Underwear

I've decided that you no longer wear a compression short under the theme of my shorts and skiing. They are too bulky. In asking simply too nervous to, and in only 14, so I can not paint it myself. How can I just my way into the conversation, or its components.