The simple answer is—tell him how those “weird noises and faces” he makes during sex make you feel and ask him to stop doing them. Yet, what I think you are really asking is how do you tell him without hurting his feelings or making him upset. I'm afraid you can't. No matter how sweetly you put it, what he is going to hear, in his mind, is “you're bad at sex.” Ouch! The problem is that your relationship doesn't have the time or commitment invested to really have that kind of talk. It’s too easy for you and him to break up simply because you've only been dating a short while.

Here’s my suggestion, if you really like him, stop having sex with him. Tell him that you think he could be special and the sex is putting pressure on you. It makes you think of marriage, family and things like that. You don’t want to rush him into that kind of commitment and tell him that the last thing you want to do is start asking him nagging questions like “When am I going to meet your parents? When are we going to get engaged? When are we going to get married?” I tell you this because if all you wanted was sex, you probably would have left him by now. I believe you do think he could be special. When a relationship is special, then sexual preferences can be discussed and both parties will feel secure enough to accommodate the other person. When (If) the time comes that you decide this is the person you are going to marry, then speak with him about your sexual preferences and your concerns. At that time, you will have much more of an investment from him in you and he is much more likely to listen to your concerns. Without that deep commitment, it’s just too easy for him to be offended, become defensive or leave.