First things first an orgasm is one of the most intense experiences you have as an human being so if you have an orgasm and don’t realise it – it’s probably not an orgasm. In men In men it is easier to spot as it is often accompanied by ejaculated sperm. Unlike women men need significant time before they can have another orgasm. Also a man's orgasm is accompanied by a series of hormones like oxytocin serotonin and prolactin being released into the body. These hormones give men a feeling of relaxation which makes them feel sleepy. Read more about