Being a mixed-sex pair of twins can be difficult when you're growing up. The last thing a little boy wants to be told is that he looks like his sister, and nor would a little girl want to look like her brother! Now that Alex and Sandrine are both 20, they're easier to tell apart than they used to be.
Perhaps the constant comparisons to his sister are what made Alex decide to keep his hair short and grow some stubble. We think Sandrine might do a little bit of eyebrow maintenance, too!