Great Sex

So recently my boyfriend and I were having a conversation about our sex life, he said he loves having sex with me that's it's really good the only problem is I tend to cum as soon as we start and I usually have multiple orgasims everytime we have sex. I told him I can't really control that he does it right and sex is always amazing with him. He says he loves that he can make me cum but it tend to get annoying sometimes when I finished too soon and it gets too wet and slippery. Do any of you ladys ever have this problem and how do I not cum too quickly? so I can let him enjoy it longer and he doesn't loose interest in sex, he really finds it annoying.