Crossword puzzle clue "which is probably why i have such a"

"...which is probably why I have such a ___"

"Why!? Why!? Why!?"

"Thinking is the hardest work there is, which is probably the reason why ___ engage in it": Henry Ford

Beer brand at this little show at an obscure venue in Brooklyn you've probably never heard of, probably

Letters on a can at a concert for a band you've probably never heard of and probably wouldn't even understand if I told you how good they are

"Why, oh why ___?" ("Over the Rainbow" lyric)

"Why, oh why isn't my boyfriend more like the 1999 sexiest man alive?"?

"Why ___ thou promise such a beauteous day": Shakespeare