I am a straight male, a guy wants me to come over and give him head, yes or no should I and why

Ultimately, the decision is yours to make based on your feelings, comfort level, and personal boundaries. Here are a few things to consider:

**Sexual Orientation**: You identify as straight, so think about how this aligns with your sexual preferences and desires.

**Comfort Level**: Consider if you feel comfortable with the situation. Engaging in anything sexual should always be consensual and desired by both parties.

**Exploration**: Some people find that exploring their sexuality is an important part of their personal growth. If you’re curious, it might be worth considering. 

**Potential Consequences**: Think about any potential impacts this experience could have on your life, your friendships, and how you feel about yourself.

**Consent and Mutual Respect**: If you decide to engage in any activity, ensure it’s consensual and that both parties respect each other's boundaries.

Evaluate these factors and make the choice that feels right for you. If you have doubts or feel pressured, it's perfectly okay to decline.