They are using Tayuu's fluid. They don't say they are using his blood, so what other type of fluid are they using? cause my yaoi brain is coming up with some pretty naughty answers.
I'm pretty sure they meant his sperm (▰˘◡˘▰)
at the beggining they're using seminal fluid, thats why hellsing was giving a bj to tayuu
They are using Tayuu's fluid. They don't say they are using his blood, so what other type of fluid are they using? cause my yaoi brain is coming up with some pretty naughty answers.