Yes, I have experienced it.

I know that there are good arguments that the real yoga is not related to sexuality, but I've found that it has increased the joy and harmony of my sex life tremendously.

I see it as the practice of hatha yoga (including pranayama and meditation) teaching one how to transform energies within the body to higher and higher states.

My experience and intuition has been that in women who are sexually unsatisfied, and men who are premature ejaculators, there is a failure of energy to reach a higher level - which is the experience of expanded orgasmic potential.

When one experiences this expanded potential, there is even the opportunity to realize it outside of the sexual realm - for it is actually an emotional/spiritual phenomenon. This phenomenon can be applied to sex, exercise, business, difficult relationships, making music, and practically anything you can think of.

At least that's how I've experienced it.

For me, yoga improves life in all its aspects.

I would think that any investment of time, energy or money in anything (yoga or otherwise) for perceived personal growth would appear to benefit them sexually.

A more interesting study might be to see how varying levels of sexual activity affected one's yoga practice. Maybe then we could begin to fine tune it by categorizing which particular acts had effects on specific poses. Ultimately we could come up with a manual of perfecting various poses by executing very specific sexual acts, and possibly this could bring one's yoga practice to a level that had never even been considered as being possible.