The beast inside hungers ...
I presume the new line is inspired from Vampire The Masquerade which calls vampire instincts the beast ...
Though they might as well write "unleash the beast" : would sound both more funny and kinky.
( I read PrivateRacoon's post after. )
I've never played World of Darkness p&p that PrivateRaccoon mentioned, neither have I played Vampire the Masquerade, I've heard of VTM though, everyone who's played it had only good things to say about it... I've even seen a bunch of youtube let's plays of VTM, cause I was quite curious quite a while ago. The only vampire centered games that I've played in the past are - Legacy of Kain series, in particular I loved both Soul Reavers and Defiance. But they are hardly RPGs, more akin to Tomb Raider in fact.
Now that's a good one! I'm totally on board, I would use bleach as well, just to make sure my eyes remain clean!