Slightly personal question about sex? Please help?

I can't stand the taste or the temperature of my partner's semen so I always spit it out... I feel so bad about it because on the few occasions it's ended up in my mouth, I've made such a fuss about it that he's started to feel a little... Rejected. I hate how warm it is and I hate the taste so much it makes me feel a little ill... I understand the heat of it is a sign he's really aroused as the temperature rises with your arousal (apparently). However, I heard the taste can be changed depending on what foods they eat. If so, which foods are these? What can I do to make up for my making him feel rejected? Please help, but serious answers only please!