The first time I had a plug in, it did nothing for me until I then used a dildo vaginally. Once the dildo was in and I was rubbing my clit, I couldn't feel the plug in anymore (it never felt good in me, just benign, or so I thought ...). Then, when I came, it not only was really strong, it kept going on and on as long as I squirmed around on the plug! I never expected that! So yes, a plug can make an orgasm stronger ... and last longer, in my experience, limited as it is .