That was exactly my question. Thanks Grace. I hadn't really seen that clarified anywhere.
hsv1 genitally doesn't shed very much at all. the odds of transmitting it to a partner are overall very low regardless of the location. it isn't more likely to transmit to the oral area just because it prefers the oral area for infection if that was what you were thinking.
if your partner hasn't been tested for herpes, he needs to be tested. it's important for you to know both his hsv1 and hsv2 status so you both can make educated decisions about what precautions to take. if he has hsv2 and doesn't know it, you need to be protecting yourself against that!