What age is it okay to start dating?

My first date consisted of getting a blow job from an older man, probably in his 40s.   I was 17 years old. 

My second date was two years later and I got another another blow job from a dude closer to my age.

I don't know when I started going out on dates that did not begin and end with getting a blow job.   Probably early 20s....   

So, you see, it's all relative.