Masturbation and Pornography

Masturbation

Q: Masturbating with the hand is forbidden, whether a person fears adultery or not. However, if adultery cannot be prevented except by it, he should give it precedence over it, committing the lesser of the two evils." 

Query 

Maliki say it is haram even in fear of zina but in necessity, do they say it is permissible or excused or do they say prefer it? What is the meaning of that... In necessity it will be still sin and haraam? Explain the latter statement, what they are saying from However if...two evils.

Masturbation

Q: Scholars who don't allow masturbation as adopting lesser of the two evils like to avoid zina when there is real fear, do these scholars consider masturbation and zina equal in sin, when only done to avoid zina. What's their stance like many Maliki scholars and Shafi?