Why do kids these days look older than they really are?

Oh my saw this guy at church the other day for the first time as I went to a different service than normal. He was in the band and I was like that is my future hubby. I guessed him to be early 20's so a little young but still not so bad. He came off the stage and sat with the high school crowd. I felt ridiculous. Why do kids look so much older these days?
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