The investigators will test the hypothesis that the addition of a 5α-reductase inhibitor or the progestin IM DMPA to exogenous T, by modifying the intraprostatic hormonal milieu, will alter prostate epithelial gene expression. Specifically, the investigators expect that the addition of the 5α-reductase inhibitor dutasteride or the progestin IM DMPA to exogenous T, will result in decreased expression of androgen-regulated genes such as PSA.