This might sound weird but...?

Please no judgment lol but I am curious!! Me and my husband have rough sex but anyways this girl I work with she came to work with bruises on her and let's just say she really likes sex so she talks about it but she said literally "the sex was so good look at all these bruises" I have never had a bruise from me and my husband having sex is there something I'm missing out on lol might sound weird but I'm curious because my husband was my only partner ever...