Does "TANTRIC" Sex Result in Better Orgasms?

I was re-reading that oldhoary classic from my college days (“The Harrd Experiemnt” by R.H. Rimmer). In it, reference is made to the tantar-and the sexula techniques described within. Has anybody tried this? I’m told that using these techniques, the maleorgasm can be greatly extended-up to 3 hours is possible!
Anybody have a good book on this? Can’t wait to try this…umm…3 hours of bliss!