I am 43 years old and ever since I was put on celexa for depression I started getting sexually active. The problem is, i'm not interested in anyone my age. Everyone i've been with is from 20-31 years old. I have a steady boyfriend now and he is 21 years old. We have a good relationship and lots of good sex but sometimes I feel like a pervert. Is this normal for my age, or could it be the medicine i'm on or am I mentally disturbed?