Why doesn't Oxygen form coordinate covalent bonds? [closed]

We know that an Oxygen atom has two lone pairs. Why doesn't oxygen then form coordinate covalent bonds using those since it has nothing to lose?

• Of course it does, why anyone would think otherwise? Jan 2 '20 at 15:25
• Take a deep breath, and think about how that oxygen reaches your brain bound to the iron atoms of heme in the hemoglobin in the red blood cells. Jan 2 '20 at 17:45
• chemistry.stackexchange.com/questions/67220/… Jan 2 '20 at 22:10

1. The $$\ce{H3O^+}$$ ion at the center of the solvated proton in aqueous acids, also available as salts of some of the strongest acids such as $$\ce{(H3O)(ClO4)}$$