Lust when used in the right way..AKA..UNSELFISHLY within marriage..is NOT sinful.

Lust is sinful when its ONLY lust.

When you lust after your own wife or hubby..thats NORMAL..cause its also giving..you share the pleasure IN LOVE as was intended.

But when you lust NOT CARING about the other person as a person..but see them only as an OBJECT to drool over..THEN its selfish..THEN its sin..because selfishness IS SIN.

LUST is neccessary to produce children..how do ya get a hardon without actually having sexual thoughts??

So its NEEDED..and is NOT a sin if USED AS INTENDED.