In my experience, it’s awkward at first but the more you discuss it, the easier it gets. I also think the rapport between you and the therapist plays a big role. I had a therapist 30 years my senior and because of some paternal feelings that I had toward him, talking about sex is awkward. My therapist currently is about 10 years older than me, but decidedly he feels much more like an adult than I do. So many of my issues revolve around sex, so I kind of just had to jump in. I don’t feel any bit of awkwardness now at all.