There are many in the Tantric Industry who claim that male ejaculation of any sort is wrong. So let me tell them a little secret, if that was the case they simply would not be here. In Tantra all forms of pleasure are sacred, and that of course includes ejaculation. What tantra has to suggest is that your lingam is your wand, and ejaculation is your magick.
You are encouraged and guided to enjoy your fattening lingam for as long as possible to strengthen your ejaculation energy, allowing you an uncontrollable, juddering, screaming orgasm that re-connects you to your original self, where heaven is to bask in Gods love with no need to control, or be described, as anything other than, that, that is tantric.
Any suggestion that men should inejaculate or not ejaculate is simply not tantric.