GUYS, we get it. When it comes to grooming and taking care of your mug, the last thing you’d want is an extra step in your morning routine.

But if there’s one thing we’ll vouch for, it’s this: wear sunscreen.

According to Dr. Nicholas Lim of La Jung Anti-Aging & Aesthetic Clinic, wearing sunscreen is an absolute-must in the modern man’s grooming arsenal.

Repeated sun exposure causes skin damage and early wrinkles.

“Exposure to UV light is one of the (leading) causes of extrinsic skin damaging, especially premature ageing. Both UVA and UVB damage the skin and increases your risk of skin cancer,” Dr. Lim shares. He notes that UV radiation (which is invisible to the naked eye) is part of the electromagnetic spectrum that reaches the earth from the sun and is not filtered out by the atmosphere.

Watch the video below if you’re curious to know how people appear in ultraviolet. Take our word for it – it’s a pretty mesmerizing watch.

Before you head out for the day sans sunblock – or take your shirt off to work on your tan during a beach vacay – know this: sun damage is the number one cause of wrinkles and permanently damaged skin.

“Repeated sun exposure will cause age spots and skin discolouration usually found over the hands, arms, face and back in men,” Dr. Lim points out. “Fine lines and wrinkles will appear as a result of this unintentional sun exposure; they add up and cause our skin to age faster than normal.”

Spending the whole day out? Be sure to apply sunscreen every 2 hours.

Unsure about how much sunscreen you need to apply? Well, it really depends on how much of your birthday suit you’re flashing at any given time. “Most adults need about one ounce, enough to fill a shot glass, to fully cover their entire body,” Dr. Lim highlights. “Don’t forget to apply the tops of your feet, neck, ears and head too.”

Men typically experience sun damage on the back, so don’t forget to apply sunscreen there.

Remember to put on sunscreen to dry skin at least 15 minutes before going outdoors, Dr. Lim says. Once you’re out, don’t forget to reapply every two hours. The same rule applies if you’re swimming or sweating too.

The rest is just common sense. Try to avoid peak hours between 10am to 2pm, and seek shelter in shade when you’re out. Next, wear special clothing with built in sun protection, and don your sunnies too.

Need some extra convincing that sunscreen deserves a spot in your grooming routine? The hit song Everybody’s Free (to Wear Sunscreen) by Baz Luhrmann from the late 90s might just help change your mind.