First, stop taking any medicines for the problems you
mentioned. Masturbation is harmless. It does not affect your
sex life in any way. You will be sexually as fit and able as
any other person.
Ejaculating within a minute or less is called premature
ejaculation (PE). This is common and natural for youth and
slowly tapers off once you get into regular sexual life, say
being watery is not a problem too. Actually when semen is
ejaculated it is somewhat thick and whitish in color but it
liquefies (becomes watery) within minutes. In fact, if it
doesn't liquefy it can be problematic for fertility. So,
being watery is not bad.
case you are wondering, semen is released in a watery
fashion under two circumstances: 1) when you are too highly
excited 2) when
you masturbate or have intercourse twice within a short
time. But that is absolutely okay.
As it is, everything is fine with you. Dont gulp down loads
of medicines for no meaningful reason.
Regarding your other questions: A slight curvature in the
penis to the left, bottom or in some men to the right is
comon when the penis is erect. This is normal and does not
hamper your sexual pleasure or performance.
way, try to lose some pounds, unless yours is athletic body,
because excess body weight caused by fat may reduce
testosterone and increase estrogens in your body.