fluctuation in erection

[plzhelp]

i am a 28 years old virgin male , my gf satisfy me by
her hand , i have 2 major issues
1) as soon as she take her hand off from
my erect penis while massaging , my penis get softer
again , is it natural?

2)secondly when my penis is erect it turns to the left
and the root (shaft) of the penis seem to me very thin
as compare to the middle and ending part of my penis
which becomes thick and bulky, plz help me as soon as
possible.

[Mandelbaum]

Maybe you just need alot of stimulation? As for the shape, its perfectly natural for a penis to curve. Don't know about the bulge in the middle though.

[plzhelp]

its not the bulge in the middle , its just it seem more then towards the end then where it sarts from