my husband is the same way sometimes. don't accuse him of arguing. call it "debating" instead. my husband "debates" everything, even if he agrees with me. we actually had this discussion about a year ago, when he finally explained to me that he likes to play devil's advocate just so that i can get the other side of the story. although i do like to get both sides, sometimes i just don't care and don't want to hear his advocating something i don't agree with.

i know it's probably not entirely the same, but talking it over calmly helps a lot. just let him know he makes too many points and that these debates get too heated over silly stuff that doesn't matter. and if he says something like "but i like to debate things" (like my husband does) just tell him you're not in the mood and maybe he can go debate with someone else about it, haha.

i don't know if this helps, but i hope it does.