Age does matter as a teenager. During puberty you evolve the part of the brain (frontal) that makes you think consequences, reflecting upon choices etc. Before that you act more on impulses and fun, not thinking about consequences, and as the hormones start acting you add it up with a lot more of emotions running in your body. It´s a biological fact and has nothing to do with the culture in your country. The brain of a 13 year old boy that just started puberty is not evolved like a 17 year old female, and boys evolve slower than women. And a 17 year female should know that and be aware of it, and not potentially exploit someone that is acting more on impulses. You can compare it to when you drink alcohol, you act more on impulses and don´t think consequences or reflect - that is basically how evolved a 13 year old boy brain is. A mature sober human being would be aware when someone is affected by alcohol/drunk and advise them and take care of them, so they are not doing something stupid they would regret when they are sober again. The same kind of act and consideration should we have when it comes to teenager who brains are not fully evolved, even if they verbally say something else.
In my country it has even been discussed if boys should get their drivers license later then women (18) because they still act much on impulses and fun in the traffic, not thinking about consequences and potentially causing death or serious injuries. So it takes really years for boys to develop that part of the brain.