I'm going to try and make sense here here...but I disagree. From what I've seen, generally a girl will subscribe to a guy if they feel they're attractive and trendy, or they can relate to them. I notice a lot of my fashion haul/skincare videos do a lot better than my other videos. Basically, if you look like you can fit into One Direction girls will subscribe to you...even if you're not all that funny. On the other hand, I don't think females can build an audience based on being hot. Sure some guys will subscribe, but I don't think they'll stick around if you're not bringing anything else besides your looks to the table. Most of the big YouTubers you see, Daily Grace, Jenna Marbles, etx, are attractive but they're also really talented and funny...and that's why people watch.