Unchartdwaterz

Ok. My wife just recently turned me on to letting her stimulate my prostrate! Well what I feel is a strong urge to move my hips in a fucking motion and feel like I could cum a bucket load but I don't and my cock ain't even hard? I'm also breathing hard and sweaty but still no traditional ejaculation....what the hell am I experiencing? Seems a bit silly but I'm a bit confused!! Can anyone xplain this to me??