- Having much sex
If you have sex twice a day for one week there will be no problems with premature ejaculation
- Slow down sex
There is one sexual meditation in the vigyan bhairav tantra, a 5000 years old set of meditation practice there is one text that says:
Rest in the embers
Which means: Have sex without ejaculation for a long time. After a certain time your brain will start making funny reactions and altered states of consciousness (ASC) appear.