Fake Blood

Hey,
Im quite new here but thers something i wanna know
My gf wants to have messy sex in fake blood. I was doubting about it but she's the boss (A) so we have found a recipee...
But im curious...does te food colouring stain to your skin/clothes? if its only gonna ruin the clothes it is not that big deal...but i dont want to walk a week with a red spot on my face from our little adventure (A)
Anybody ideas/tips/experiences with fake blood ??
ltr Orion
ps: heres a little video with the recipee,
http://www.flabber.nl/archief/022059.php
Im quite new here but thers something i wanna know

But im curious...does te food colouring stain to your skin/clothes? if its only gonna ruin the clothes it is not that big deal...but i dont want to walk a week with a red spot on my face from our little adventure (A)
Anybody ideas/tips/experiences with fake blood ??
ltr Orion

ps: heres a little video with the recipee,
http://www.flabber.nl/archief/022059.php