What exactly is a twink?
What Wikipedia has to say.

The label of Twink is used in gay slang to describe an attractive young or young-looking gay male (usually 18-22) with a slender build, a slight muscular physique, and little or no body hair. In some societies the term "chicken" is preferred.

Originally, the term referred exclusively to blonds, but among gay people the term has become increasingly inclusive to refer to other young men whose physical features match those principally described above, but are not blond or even Caucasian.

The term can be used in a derogatory and pejorative manner, implying shallowness and lack of intellect. In some cases it is a neutral descriptive term and in others it is a badge of honor. Twinks can include the subsets skaters and surfers and can be contrasted with the jocks and the bears. although this generally represents a more feminine look.
The term twink is often modified by various descriptors such as butch twink, femme twink, Euro twink, or muscle twink.

The origin of the term is unknown but might be an allusion to the Twinkie pastry, which is golden (blonde) on the outside with cream on the inside, and is pleasantly sweet but with little nutritional value.

There is a acronym that states "twink" stands for "teenaged, white, into no kink," although none of those things are either necessary or sufficient for being a twink. is a deliberately altered spelling of boy that has become recently fashionable, and is sometimes used as a synonym for male when referring to young adults. 'Boi' is often used within the gay community to refer to a young-appearing (and in reality relatively young) bisexual or homosexual male, especially one who is somewhat effeminate, or who merely wishes to distinguish himself with a different term from heterosexual boys

Below a Twink gets his dick sucked ....and sucked properly!