Don’t do anything you don’t want to. Dare to say ‘no’ or ‘stop’ so the other person knows you don’t want it. It’s pretty common that during lovemaking you find out there’s something you don’t like. If it happens, stop and talk about it.
Sometimes it’s good to say no. For example if you like someone less than you thought at first. Or if you’re not ready to have sex with someone. But saying no sounds easier than it is. How do you go about it?