Genital sensitivity -- and sometimes sensitivity of some other body parts, too -- is common for many people after orgasm. The length of time after an orgasm that it can or does last varies from person to person, experience to experience and it can often vary with age too. It's pretty common for people to describe that feeling like touch or stimulus that just feels like too much, or touch or stimulus that feels like being tickled in the uncomfortable way, not the fun way. The refractory period is something that most likely occurs because of neurochemicals in our bodies that get revved up with orgasm, and which temporarily change the way we respond to things, or the way things feel to us. The refractory period, as something that makes erection or orgasm impossible for a period of time, is also primarily something that's about people who have penises. Because of this, many sources say that many men will be physically unable to orgasm again for minutes after ejaculation but that this can vary from person to person; it can be a much shorter or longer period of time.