If you are against gay marriage, explain why without mentioning religion

[Roma]

Max King of the Wild said:

Roma said:

warlord74 said:
http://www.youtube.com/watch?v=IOUR5HPg1Mc

Hard to poke holes in his argument.

that's actually very interesting! I never thought of if you use sperm to get pregnant by an unknown father could lead to you actually having your egg fertilized by your brother!

I thought they registered every person that donated sperm but according to him they don't! that's just disgusting!

you obviously didnt watch the video

what did I misunderstand then?