The only reason's you've given are health-related. You've given no moral issues, other than if you look at someone who is good looking you lust for them, which is wrong. First, it's not lust. Lust is different from wanting to have sex. Second, what's so wrong with wanting to have sex with someone? It's a basic human drive. There are plenty of people I want to have sex with, and if you say it's different for you chap you're just lying. It doesn't control my life though, which is what lust is.
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