Is sex really necessary?

*From my daily on 13/August/202x

These days, I’m wondering;

Is sex really necessary between us?

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I know she likes me

She must know, I like her

Then, sex — this physical act — feels like an unnecessary layer to make sure

make sure of
"We liked each other at some point in our lives"

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If sex happens, then
this secretive act in bed honourably becomes "a proof" of something —

something about our liking each other

But now,
I’m sure she likes me

And she knows, I like her also

Then
do we really need "another confirmation" of our mutual feelings?