I think I can give a slightly different perspective here...
I came out to my parents slightly older, in my late 20's actually. Years earlier (in college), I had a long-term girlfriend who often spent long weekends and maybe a holiday or two with my family at our home. The house rules were always the same: separate bedrooms for unmarried couples. Now fast forward to my late 20's, and I bring my first boyfriend home for Christmas. I was fully expecting the same rules to be in place. [Actually, I never gave it a second thought.] My older sister also had her new boyfriend stay with us that same Christmas. While my sister's boyfriend got stuck on the couch in the living room, my boyfriend was put in my room with me! I will be honest, a part of my was thrilled that my parents were being so "open minded" about it all... But another part of me was like, "Hey, why am I being treated differently now?"
Just something else to consider.
I came out to my parents slightly older, in my late 20's actually. Years earlier (in college), I had a long-term girlfriend who often spent long weekends and maybe a holiday or two with my family at our home. The house rules were always the same: separate bedrooms for unmarried couples. Now fast forward to my late 20's, and I bring my first boyfriend home for Christmas. I was fully expecting the same rules to be in place. [Actually, I never gave it a second thought.] My older sister also had her new boyfriend stay with us that same Christmas. While my sister's boyfriend got stuck on the couch in the living room, my boyfriend was put in my room with me! I will be honest, a part of my was thrilled that my parents were being so "open minded" about it all... But another part of me was like, "Hey, why am I being treated differently now?"
Just something else to consider.