Doesn't really matter whose spit. As long as there is spit.

[Derek waves a hand nonchalantly. He then points at Li-Na.]

There is my apartment. I live alone... Plus i have a car that we can toss him into. Though I do worry a bit about any neighbors hearing him make any nose. Kind of wishing I had a spell to deal with noise or not wanting someone to over hear what ever is going on...