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.

[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.