Pumps help to create a firmer erection and constriction rings help to maintain it. They can both be used just for fun and sensation. Vibrating rings can also help to make erections firmer and are great for partner play or even to add external stimulation to an internal use vibrator or dildo. Masturbation sleeves are great fun for solo play or for a change of sensation for handjobs. For more information on cock rings, read this guide.