Since Jesus Christ was born as a human being, how did he live a chaste life? Because being a human, it is very normal to get attracted to the opposite gender.

You’re right, it is perfectly normal to be attracted to the opposite gender. However, we should distinguish between simply being attracted to somebody and how one acts on those feelings of attraction.

We are made for beauty and are naturally drawn to it. Beauty is that thing that makes us go “wow!” when we experience it. And it comes to us in many different ways: we see beauty in nature, art, music, culture, faith, and of course people. So when a man sees a beautiful woman (or vice-versa), that reaction of “wow!” is normal. Remember the words of Psalm 139:14, “I am fearfully and wonderfully made!”

However, what comes after that “wow!” is our decision. We can take that experience of beauty toward a good end, or toward a sinful end. For example, a man sees a beautiful woman and is attracted to her–he then silently thanks God for her beauty and maybe says a prayer for her. That would be a good response to beauty. But he can also respond to that beauty in a sinful way–he can hold onto that thought of her, let his imagination carry him away, pursue her against her wishes, and so on.

The point is that being attracted to somebody is not a sin. What we do with that attraction, though, requires a moral response from us–and we can choose to respond virtuously or sinfully.

In the case of Jesus, he is 100% God and 100% man–which means he experienced every part of our human experience. He is like us in all things but sin (see Hebrews 4:15). That means that like us, Jesus got happy, sad, hungry, angry, tired, etc. And he experienced beauty and attraction too. In fact, being the author of all beauty, he probably experienced in its deepest way. But being sinless and being God, Jesus never acted on any of those feelings in a sinful way–never turning it to selfish ends, never lusting after someone.

The fact that Jesus, who experienced regular human life, was tempted but never sinned can actually give us hope! We can be similarly pure of mind, heart, and body in all our interactions with the opposite gender. With the help of God’s grace and mercy, we can love every man and woman just as Christ did: with the eyes of love.