Can everyone, no matter the age, get gynecomastia?

Yes. Males only.: Very rare prepuberty. Most common in males middle aged and above. Seen in younger males, especially if taking body building hormones or smoking lots of pot. A large percentage of gynecomastia is idiopathic i.e. We don't know for sure what caused it.

Yes.: Yes, males of all ages ( after puberty) can present with gynecomastia. If symptomatic and/or aesthetically displeasing, surgical correction of gynecomastia can be worthwhile. Treatment is individualized depending on the specific patient's situation; involves direct excision of glandular tissue, liposuction surgery, and/or occasionally excision of excess skin as well.