DEAR ABBY: This may seem like a dumb question, but I really need to know the answer. Can you get pregnant when your breasts are still underdeveloped?

My boyfriend says you can’t, but I need to know for sure. I’m afraid to keep birth control in my room because my little sister, who I have to share a room with, constantly snoops through my stuff when I’m not there. She would be sure to show it to our parents if she found it because she loves to get me in trouble, so I really need to know the answer to this. – QUESTIONING IN OKLAHOMA

DEAR QUESTIONING: There is no such thing as a “dumb” question.

Your boyfriend is mistaken. Breast development has nothing to do with whether a girl can become pregnant. The onset of a young woman’s menstrual cycle has everything to do with it. Under no circumstances should you have unprotected sex. Not only will it place you at risk for pregnancy, but also for sexually transmitted infections.

DEAR ABBY: After six months of marriage, my son and daughter-in-law have decided that it is not what they wanted. They are being divorced. They would like to return the gifts of money they received from family and friends, along with the other gifts they received.

How should they go about returning the money, and what do you say to well-wishing people? – EMBARRASSED AND DISAPPOINTED IN NEW YORK

DEAR EMBARRASSED AND DISAPPOINTED: Rather than feeling “embarrassed and disappointed,” be glad that your son and daughter-in-law realized they had made a mistake before any grandchildren came along.

Let’s hope they made a list of how much money each of the donors gave them. If that’s the case, they should have no trouble writing checks to them for that amount. The checks should be enclosed with a brief note, thanking them again for their generosity, and telling them that “regretfully, the marriage did not work out.” The same is true for any UNUSED wedding gifts.

DEAR ABBY: What do you do about an ex-fiance who just won’t let go? I ended the engagement 10 months ago and have moved on. However, my ex has sent me letters, and there is evidence that he has sat on my front porch waiting for me to come home.

Recently he found out through a mutual friend that I have been seeing someone. He keeps trying to pry details about my new relationship out of this friend. I’m sure he’s trying to find out if I was dating while I was still engaged.

Now he plans to attend a community theater production I am appearing in. How do I handle this situation? – NEEDS AN “EX”ORCIST IN ST. CHARLES, MO.

DEAR NEEDS AN “EX”ORCIST: Your former fiance appears to be obsessed with you, to the point that you are being stalked. Whether you dated someone while you were engaged to him is irrelevant because the relationship is over.

Because his behavior is obsessive, I recommend you discuss this problem with your local police department. They can tell you what precautions you may need to take – and also if the man has a prior history of stalking behavior.

Dear Abby is written by Abigail Van Buren, also known as Jeanne Phillips, and was founded by her mother, Pauline Phillips. Write Dear Abby at www.DearAbby.com or P.O. Box 69440, Los Angeles, CA 90069.