what is if (does the who why) and?

me perhaps you perhaps the trees
(and thousands of them(i have seen)
and thousands more await
each day as grass of us
belched of cloven stuff foil'd
'bout the neatness of gravestones)

there is a garden
and i have been amongst who
the stems of it sleeps girls
in their skin awake;

in their skinny awake
on unsure knees
ushering

boysandgirls

to and fro

toandfro boys and girls

go into each other their lips and out comes the Earth.