I've got curious about trying a penis pump. Not that I'm struggling with ED, but I heard pumps can help to improve stamina and stay hard longer during sex sessions.

Has anybody tried them? Do penis pump as effective for erection and increasing penis size or is it just internet myth? If pumps are so great as the ad says, what type are better and handier in use? Which one do you prefer and why? Do they have any side effects? Appreciate your answers a lot!