Charlie wrote:
i'm dating a beautyful girl that's a confessed vegan.

Even if you've already formed feelings of attachment, it's probably best
to dump her. Vegan women are often extreme neurotics with eating
disorders. How they treat their food is how they'll treat you: pick,
nag, whine, gripe, moan, complain... it'll never freaking end.

we did not go very farther, despite her interest, because i have this doubt:
will she swallow?

What's her name? Maybe someone here can answer.

i cannot produce sperm without human proteins, and i'm afraid she'll end up
spitting everything out.

an italian friend of mine, named sago, same vegan religion, does not want to
answer this question.

Perhaps Sago is too embarrassed to admit he swallows.

can you please explain? do vegan suck and swallow or it's always a party
that ends in the most interesting part?

Why waste your time pursuing someone with an eating disorder based on a
flawed political/religious views? Nitpicking at food carries over to
relationships. Unstable, people make unstable lovers. That might be fun
for one night, but before the end of it you're ready for her to get the
hell out.