hi, me and my husband get married 2 and half years before, we are sexually active sometimes we do sex once or sometimes we do twice a week. i am on a fertility pill so we have to do sex on specific four days, after those days our sexuall activity becomes less, my question is my husband age is 35 years and he still ejaculate sometimes while sleeping after every 3 or four months, is it normal? what is the reason behind it?