Well thats tough. It really varies.
Without porn and lube.... maybe like 25+ mins
Without porn and with lube..... 10-15 mins
With porn and no lube.... 20+ mins
With porn and lube.... like 10 mins
Sex, lets bring thouse numbers down a bit haha.... from like 30 secs- a minute 30.
The Years Have Been Short, But The Days Go Slowly By.