It is actually common to have homosexual feelings during adolescence. Whether or not you want to say this is normal depends on what your definition of normal is. If you mean, "Does this happen a lot or is it unusual?" Then yes, it happens a lot, and no, it's not unusual. If you mean " Is it a healthy, natural part of growing up?" Then we would say there are a lot of very common things that are a part of growing up that are neither healthy nor natural. Hatred, lust and deceit are likewise common during the teen years, but not healthy.