[spel_grammer_an_punct_polise]

“but why so long?”

Oh! I forgot the ‘you-ended-the-sentence-with-a- preposition’ posts! LOL

[Fungi]

There’s no necessity to ban prepositions from the end of sentences. Ending a sentence with a preposition is a perfectly natural part of the structure of modern English.
http://www.oxforddictionaries.com/words/ending-sentences-with-prepositions