Sex favorable refers to an asexual person who enjoys and may even seek out the act of sex. Reasons for asexual people to enjoy sex are as varied as asexual people: they enjoy the sensation, they have high libidos that sex helps relieve, they enjoy the act of sexual service as part of a kink, etc.
Enjoying the act of sex does not indicate having sexual attraction toward any specific person. While being sex-favorable is most common among graysexual and demisexual identified ace people, even strictly asexual people can enjoy the act of sex without having sexual attraction.
Sex-favorable asexuals can still have gender and activity preferences, even if the sense of sexual attraction isn't present toward any specific person or gender.
