Too--comma, or not?

[Majyk]

Alright, well, I was critiquing, and the person disagreed with putting a comma in front of 'too'. That got me wondering if they were right and I'd been wrong. Do you need a comma before the word too? Such as... "I went to the park today too." Vs. "I went to the park today, too." Which one is grammatically correct?

[Simmi]

I think adding the comma is grammatically correct... But your question is starting to get me thinking... >.<

[Carraka]

The disagreeing person is me, by the way.

[Majyk]

Sorry, I wasn't sure if I should've put your name or not.

[Imelda]

Hmmmmm.

It, too, sucked--possibly worse than the first film.

Well I went to the park and the cinema. Oh, and the mall, too.

I'm thinking commas are good, but not always necessary, especially if it's in speech as it could be part of the way people say things.

[Majyk]

Ah, okay. Thanks.

[Shaun]

Imelda is right. Comma in this case, but not necessarily in all cases regarding "too".

[Majyk]

Alright, thanks for clearing that up.