"Beautiful" for boys?

Try comely

COMELY adjective:

1. pleasurably conforming to notions of good appearance, suitability, or proportion

2. having a pleasing appearance: not homely or plain

Origin of COMELY:

Middle English comly, alteration of Old English cȳmlic glorious, from cȳme lively, fine; akin to Old High German kūmig weak

First Known Use: 13th century

(Merriam-Webster online)

These words come closest to the unisex adjective that you are looking for:

• 'cute' is often used to describe both male and female subjects.
• 'pretty' is sometimes used for both genders, although it might have a negative connotation (example: school bullies making fun of good looking boys).
• 'handsome' was often used to describe a middle aged woman, but this is not very common today

If the boy is still a child, pre-adolescent, he can be described as being beautiful.

He's a beautiful baby/child/boy

sounds perfectly acceptable to my ears. The boy himself might object to being called beautiful once he turns into a teenager, as it is usually considered an effeminate term.

For teenagers and adults, the genderless adjectives good-looking, and attractive are the safest and best-known options. They can be used for young and “mature” people, both men and women.

Good-looking as defined by Oxford Dictionaries (Chiefly of a person) attractive.

Damon looks to be on the fast track towards becoming one of cinema's brightest bad boys. He's a good looking guy who can look brooding with the best of them, bringing to mind James Dean and the young Marlon Brando
_{Michael Redman}

I'm tall, slim, blonde and, so I'm often told, a good-looking woman. I know how lucky I am. But there are downsides to being pretty…
_{Samantha Brick}

attractive (Of a person) appealing to look at; sexually alluring:

• For I suddenly seem to be encountering a new generation of stunningly attractive women in their fifties.

• Footballer David Beckham is one of the most sexy and attractive men on the planet.

Lovely

lovely [luhv-lee]

adjective, lovelier, loveliest.

1. charmingly or exquisitely beautiful: a lovely flower.

2. having a beauty that appeals to the heart or mind as well as to the eye, as a person or a face.

3. delightful; highly pleasing: to have a lovely time.

4. of a great moral or spiritual beauty: a lovely character.

Considering the term “beautiful” is actually taken from the French masculine adjective “beau” it shows that the term has clearly been misplaced within the English language. As “beau” describes male aesthetic and “belle “ describes female aesthetic. However disregarding evident western social constructs found in the English language, i feel that “beautiful” is perfect for describing both men and women. (Unisex)

I personally believe that beautiful can describe both genders. As the dictionary defines beautiful as being something or someone that is pleasing to the senses or mind aesthetically. For example "beautiful poetry" “beautiful man” “beautiful woman”

Beautiful word is only perfect for a girl and women. And it is not used for a boys but sometimes it's used for (boy)child not for teenagers or adults .There are some other words like handsome, good looking ,dashing etc.are used for men.