The warning I issue to men eager to upgrade their sex lives with the tantric methods and "sex hacks" detailed here is: Be VERY discerning about the woman that you ultimately have a lot of fun practicing this stuff with in the bedroom.
With the WRONG woman, you can open a pandora's box of trouble, drama, expense, and stress. If you're wondering what constitutes the right kind of woman (and where the heck you might meet them) - save yourself a lot of headache and time by reading my book: Don’t Stick Your Dick in a Blender: How to meet a nice girl instead - from a tantric husband with a better sex life than you!