when someone mentioned the possible age of a girl his reaction isn't to give any clear denial - he just doesn't know the ages of the prostitutes he slept with.
I'm guessing Lloyd didn't ask the prostitutes for proof of age. Some women are so addicted to drugs that they'll just lie when asked if they're forced into sex work, just so they can get their next fix. Some underage girls might be so scared of their pimp when asked to give their real age that they'll just say their 18 to do their job and get paid.
Obviously, I'm not saying that Lloyd definitely and knowingly slept with underage girls. But Lloydy boy didn't know their real ages, and it's possible that he slept with an underage girl (don't know about Thailand but this is viewed as rape in many countries), or possible that he slept with someone who was forced into sex work (this could also be viewed as rape).
Whatever, it's obvious Lloyd should not be getting into the WTS child abuse side of things when he could possibly have done that himself.