If you don't have any lust. And if you can go without any kind of sexual stuff including touching oneself, then absolutely! By all means!

it is a very important thing specially it regulates mood and gives mental satisfaction... I guess psychologically it is healthy to live with out it , but scientifically it is much more appreciated to not live without it.

Yes n no u can live without it but if u can't regulate ur emotions in a healthy way then no it's not going to be a good road for u even if u don't want sex ur gonna touch urself or watch porn or do both but if u can restrain urself n have a good spiritual warfare then it's going to be a healthy life for u

what do you mean ''what is the importance of sex'' what kind of silly question is this