I just want to know the age range when men are at their peak in sex. I am now 40 years old. My appetite for sex reduced when I was on my middle thirties but it returned when I reached 40. I may not be as aggressive as when I was in my teens but my body yearns for sex at least every other day. Is this normal to people my age? How long will it last? I'm not complaining here, I'm just wondering.