One way is to make it clear that you're aware of their inappropriate behavior. You can give them a stern look or cross your arms in a defensive posture. This might make them think twice. Also, carry something like a personal alarm or a whistle. If they come too close or their behavior escalates, you can use it to draw attention.
Engaging in a task can also be helpful. If you're in a library, start reading a book intently or if you're at a bus stop, focus on looking at the bus schedule. This shows that you're occupied and not interested in their gaze.
If an old perv is staring at you, you should immediately remove yourself from the situation if possible. Go to a public place where there are more people, like a store or a busy café.
First of all, trust your instincts. If it makes you feel uneasy, it's a valid feeling. You can start by documenting the incident if you can do it safely. Maybe take a photo of the person from a distance (but be careful not to put yourself in danger). Then, talk to someone in authority. If it's at work, talk to your supervisor. If it's in a public place, like a shopping mall, inform the customer service desk. It's important to take action to protect yourself and make sure this person doesn't continue this inappropriate behavior.
If you ever feel uncomfortable around the babysitter, trust your instincts. Don't be afraid to tell your parents or another adult you trust. Also, you can try to avoid being alone with the babysitter in secluded areas.
One important step is to set clear boundaries. Let him know firmly what is acceptable and unacceptable behavior. For example, if he makes inappropriate remarks, immediately tell him it's not okay. Also, try to avoid being alone with him as much as possible. If you have to be in the same room, keep a safe distance.
You should firmly and clearly communicate your discomfort. For example, you can say 'Stop looking at me inappropriately.' If it continues, avoid being alone with this person and consider reporting the behavior to the relevant authorities or your superiors if it's in a workplace or school setting.
Report the situation to the appropriate authorities, like your workplace supervisor if it's in a work environment, or the security if it's in a public place. You have the right to feel safe and respected.
In some cases, they might be influenced by the media or the society they grew up in, which unfortunately might have given them the wrong idea about how to interact with others. However, none of these reasons excuse their inappropriate behavior.
It could be a lack of respect for personal boundaries. Some people just don't have proper social skills or moral values and act inappropriately.
You need to be assertive. Speak up loudly when they do something inappropriate. Don't be afraid to make a scene if necessary. And make sure you have a support system in place, like other friends or family who can back you up. If your boyfriend is allowing this, it shows he doesn't value you as he should, and you might have to look for a more respectful relationship.