Yes, asking for consent before initiating any physical contact, including a kiss, is always appropriate and respectful. Asking for consent shows that you value the other person's boundaries and feelings, and it creates a safe and comfortable environment for both of you.
In your case, given that you have Asperger's and face challenges in reading facial expressions, asking for consent becomes even more important. It helps ensure that you are on the same page and that the other person feels comfortable with the interaction.
When you ask for consent, you can say something like, "I really enjoyed our time together tonight. Would it be okay if I kissed you?" or "I'd like to kiss you, but I want to make sure you're comfortable with it. Can I?"
Remember, open communication is crucial in any relationship, and asking for consent is a positive and respectful approach. It shows that you care about the other person's feelings and want to make sure they are comfortable with the level of intimacy. If the person is interested in you and feels comfortable with the idea of a kiss, they will likely appreciate your consideration and honesty. If they are not ready or do not want to be kissed at that moment, they will also appreciate your respect for their boundaries.
Asking for consent can help you build trust and connection with the person you're dating, regardless of any challenges you may face due to Asperger's. Remember to be patient and understanding with yourself, as building relationships can take time, and everyone's comfort levels vary.