Is sex necessary for humans.is it possible to lead our lives without sex.n does the life so lead will affect mental health.cn lyf b full without sex..

Not necessary but...: Sex is necessary for the human race as a whole to reproduce & thus survive, but for individual humans it is not "necessary." everyone is different- some people have high sex drives and sex is very important for them, some may become unhealthily obsessed & others have low sex drive or interest & can have full and fulfilling lives without sex. But for most people sex is part of a full healthy life.

Yes.: Some people have little or no interest in sex with anyone, but aren't upset by this. Asexuality is uncommon, but a normal part of the sexuality spectrum. AVEN is an online education and support group that you may find helpful: http://www.asexuality.org/