After one ejaculates, it is normal to lose an erection. After a while, you can get one again. Only a few guys are able to keep it up for a second round, and even those guys usually lose that ability as they age. Use the down time to pleasure your mate.
I have inejacualted before and you will loose your erection. Some who have mastered the are of this can keep and erection and orgasm for over 15 minutes- I can't emagine but have read it in numerous different areas on the topic. You are basically getting the sensation of cumming without letting the sperm out. It is a way to not feel so tired after an orgasm. It takes practice to get it right.If not done right the sperm will come out or go into your bladder and come out when you urinate.
sounds like some other form of ejaculation. if you ejaculate, however the form, you will loose your erection! however, not all guys loose their erection after erection so if you loose it you should not worry!!