It's not that older people don't enjoy experimenting; it's just that they have a healthier understanding of consequences, and they are often responsible for other people's well-being (children). Experimentation usually involves risky behaviors. that is why people in their late teens and early 20s are more likely to experiment. They are still living under the guise that nothing bad can ever happen to them. they also tend to engage in binge drinking and drug use, which increases the likelihood of sexually risky behaviors.
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Relax... I'll need some information first. Just the basic facts - can you show me where it hurts?