What's the fastest you've made someone cum?

Providers, what's the fastest you've made someone cum? If it was really fast, how did you handle it?
Also, have you had experiences with guys just fucking you for hours without cumming?

I was having a little fun with a client during foreplay. I was teasing his cock head with my tongue and slapping it all over my face. I had not actually inserted his cock into my mouth yet when he had a sudden eruption.

I had a guy who no lie as soon as I touched his thigh he came all over himself...lol my fastest ever..I was taking it slow too like he told me..guess I wasn't slow enough..:/