Of course not. If you aren't feeling up to it you have the right to say no. If you are afraid that he will go to someone else think about it. Do you really want to be with someone who if you don't give them what they want they will just find somewhere else? If he doesn't understand then he does not respect you.
You should not give it up every time he wants it. There should be a level of communication and understanding when it come relationship between couples. Once you communicate, you are able to share your feelings and what you expect from the other.
You shouldn't do it Just because he wants it I'm not saying that it's a bad thing. But it's not the best option that you have instead make him work for it a little bit and it will feel way more rewarding and passionate. When you do finally “give it up”
Of course not. If you do then he knows he doesn't have to do anything special for you or treat you with respect. Don't treat yourself like your at his every will. Have respect for yourself and he will too. Otherwise you're just being used