I just back from China and I found there were many girls provided "liquid condom" which was applied on girls' pussy before sex. They claimed it was much better than normal condom because you can fuck them without condom and cum inside pussy, also they told me the "liquid condom" can prevent you from STD as well or even better than normal condom. I didn't know if it was true because I searched online and didn't get any useful information about it.

I guess the girls you found on Cracker may use this because I believe they come from China.