Androgens are MALE SEX HORMONES, *ALL anabolic steroids are classified ANDROGENS. Testosterone happens to be a naturally ocurring androgen, as is Dihydrotestosterone(a 5a-Reductase metabolize of Testosterone).
By increasing ANDROGEN levels, you increase androgenic activity and masculinzation. All steroids increase androgen levels and androgenic activity to some extent, Primobolan and Anavar being two of the LEAST androgenic of the steroids.