Two obtuse triangles are similar ALWAYS?

The question is to relative. Similar in what way? They are similar, in the way all triangles are; three sides and the inside angles equal 180 degrees. However, what makes a triangle obtuse is having one angle greater than 90 degrees. That's it; whether the angle in question is 90.000009 degrees or 179.9999999 degrees. I know I'm using extremes here, but I what to be clear. I hope this is what you wanted to know.