How do I get my friend not to sit on my bed?

<p>Hope she doesn’t have this disease:
[url=&lt;a href=“http://en.wikipedia.org/wiki/Trimethylaminuria]Trimethylaminuria[/url”&gt;Trimethylaminuria - Wikipedia]Trimethylaminuria[/url</a>]</p>

<p>Apparently, it makes people smell like fish but they can’t smell their bad odor and it doesn’t go away when they shower.</p>