I can't answer about ruining. I enjoy edging though. I've edged from a couple hours to 3 days. It took a little practice but I just keep going till I think I'm about to cum then stop everything. Don't touch, hold anything with your dick. Most importantly, switch your thoughts to something else. Give yourself a few minutes to several minutes to recover and repeat. The longer I edge, the more intense the orgasm I have when I finally cum!!

OMG. I have lusted after her forever! One of my favorite older porn actresses!