You can't read that 3b section without realizing just what a creep he is. 'Not that it's anyone's business, but the girls-- I mean, the workers-- I "met" were all over the age of 20. So it's okay. They were only half my age, not one-third.'
Of course, none of this means that he was paying for sex. Verifying the age of every 'woman' he meets, "sex workers or otherwise," is perfectly normal behavior. I mean, you don't want to "meet" any underage 'women' when you're out and about and seeking a bit of 'conversation' on the beach in the late evenings. Make sure they're all 20 or older! After all, that's when they stop being exploited by their pimps and become equal partners in control of their lives. Not that he was there to pay for sex! He was just looking out for those poor working girls. I mean, women...