Here are some B facts to brood over before commenting with your B sentences.
Origins: pictogram of a house floorplan
(1)Greek: beta
Frequency: 20th most frequent letter in English
(2)"B" from Samuel Johnson's Dictionary of the English Language (1755): "The second letter of the English alphabet, is pronounced as in most other European languages, by pressing the whole length of the lips together, and forcing them open with a strong breath. The Spaniards, in most words, use B or V indifferently."
(3)
Of Interest:
The lower case b came about when scribes in Roman

times got lazy when writing and left out the upper loop of the capital B.
(4)The only difference between the "buh" B sound and the "puh" P sound is that when you do the "puh", you let out a puff of air. (Linguists, feel free to correct me with the fine nuances I'm missing...)
Many idioms begin with the letter B: Back seat drive, Back to back, Baker's dozen, Bend over backwards, Bite your tongue
(more here).