How do you tell your parents that you are bi?

Answer 1

Why do you have to. If you live in their house have respect enough not to have sexual relations there. What you do on your own time somewhere else is your business. Unless you're a minor. If you're not you're going to go back and forth with the dating then you would have to tell them so they know what's what.

Answer 2

You say...hey mom...I'm bi. But you should see this a good thing, something to celebrate. After all, you have twice as good a chance of finding your perfect partner.

Your mom may be upset; she may claim it's not true, that you are mistaken, etc. Don't turn it into a battle. You might give her a copy of Loving Someone Gay, by Don Clark, and put her in touch with PFLAG -- Parents, Families and Friends of Lesbians and Gays. There may even be a group in your town.

Ultimately, your mom loves you (I hope) and wants you to have a strong, loving relationship with someone who helps you to be the best person you can. The "Plumbing" is incidental.

Answer 3

Sit them down at an appropriate time and tell them. If you're still unsure, talk to someone you trust. == If you are ready to tell them, you should first make sure they are ready to hear it. Depending on the type of family you come from or type of parents you have, they may or may not be ready. If you come from a relatively open-minded family who are okay with gay/bisexual people, it may be safe to tell them. But if you come from a family which has different viewpoints on the world and are not very accepting of others' differences, then, especially if you are a teenager and/or still living at home, it may be best to wait. If your parents are narrow-minded, or very religious in nature, telling them may hurt you in the long run and adversely affect your life. If you are young and feel that this is the case, then wait a little while until you are on your own and self sufficient enough to deal with it. Though you may feel like you are keeping a secret you do not wish to keep from them and want to tell them immediately, sometimes it's best to carefully weigh the situation before making any decisions. Despite what others may tell you, there really is no rush.
If this is not the situation, however, and you still wish to tell them, it is best to wait until the right time. Do not do it when either of your parents are under a lot of stress, angry, or if there is a lot of drama going on in the family as this will probably negatively affect their initial reaction. Try telling them after you have done something as a family that you all enjoy, if you can. Make sure they are both in good moods, and are feeling relaxed and at ease. Then, you can proceed to tell them.
I can not give you the exact words to use as I do not know you or your situation, but think about what you are going to tell them before hand. You may want to write it down and read it to them, if that will make it easier. Or if that's still too hard, just tell them that you have something important to say to them but are too nervous or scared and give them the letter, leaving the room if you have to, while they read it.
They will probably have lots of questions or want some explanations, especially if it comes as a shock to them, which it may or may not. Be prepared to answer these questions without getting defensive. They are just trying to understand and the only way someone can begin to understand something is to ask about it.
You may want to include answers to questions you think they may have in the letter, if you write one. I hope this may have helped answer your question, good luck! Personally, I have not told my parents that I am bi, because I know how they will react, and my parents won't take it well.
If your parents are open minded about this then make sure you know what to say, sit them down without others, or with close friends or family that already know. Don't just spit it out unless that's the only way for you. Try to get small talk or anything to fall back on if they take it harder then you expect, but don't be ashamed or anything, sit up straight or stand tall and be proud and let them know you are proud, if they have any respect for you they will show it and accept you. I agree with all the above. The only other thing is:
Don't always presume that your parents can't take it. Some answers from parents have been:
"Thank goodness you trusted us enough to tell us."
"I've known that for years. You should have told us earlier."
"You're still my child and I will always love you, no matter what!"