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A chat on 4chan
human
Don't think it should be called 'wives'. More like women who loved him. He says the following to Karna while explaining that life isn't meant to be fair and we should do our duty regardless:
'I did not get to marry the woman I loved, rather those I saved from the demons or those that loved me. Life isn't meant to be fair Karna, but that doesn't mean you have to stray from the path of Dharma'
gpt
16,108 to be precise.

>why
There is no answer to this. 'Why' is an indication that there is some outside reason to an action. That there is a cause.
Krishna is Causeless. Nothing compels Him, nothing forces Him. He is not beholden to gravity, to time, to any law of physics - for they, instead, obey Krishna.
The answer to 'why' is 'Krishna enjoys it'.
>I think Krishna was chaste.
Not at all. Krishna has wives and girlfriends and acts with them in an intimacy unable to be understood if one is still thinking in terms of material existence.
And Krishna had 108 sons with every one of His wives.

No.
You are thinking of the Gopis in Vrindavan.
Rukmini Devi is Krishna's wife, and the first of the 16,108 wives He married in Dwaraka.