If you have ever gone to a sexual store to buy a new vibrator, you might be pleasantly surprised to see that the vast majority of vibrators marketed for men do not include a cock sucking function. Instead you will see a man's member mounted on some sort of cock ring, or other sort of device that looks similar to a dildo but which is primarily used for stimulation when a man enters a woman from behind. While there is nothing wrong with using a penis enhancement device for purposes other than increasing a man's sexual pleasure, there are plenty of very erotic ways in which a woman can stimulate her man's penis using the mouth..