You run the risk of alienating people and having them think of you as rude or unskilled.
Remedying a lack of social skill (in this case, the skill is called "assertiveness") is something that takes practice.
Only you can know if this is about shame and fear, but if it is, I encourage you to sit with a therapist for a few sessions and talk out your fears. The second issue is more practical, and it has to do with the fact that people don’t like to be objectified.
Let’s assume for a moment that you are looking at breasts because they look good to you and not simply because you have social fears, find it difficult to look people in the eye, and are just looking down for those reasons.
With regard to the first issue where you fear you might have a little homosexual interest.
You can read books on assertiveness (and this material in our self-tools self-help book), and I encourage you to do that, but really you need to practice.
Working with a therapist on this stuff can offer you a chance to role-play and practice, so I really encourage you to work with a therapist if your issue is assertiveness.
Given a choice, what would you choose: an American-style waffle drizzled with luxurious Belgian chocolate sauce, topped with chocolate brownie chunks or a nice crumbly sweet, chocolate mousse cheesecake pie served with a scoop of vanilla ice cream? But can you accept bisexuality in your close family? Mom Junction gives you insights into bisexuality, the signs that tell you that your partner is bisexual and how you can help yourself and your partner in such situation.