Normal sexual response has several phases, there is the libido phase, the sexual excitement phase, and the relationship with the mammary glands is that in the sexual excitement phase the mammary glands will respond with swelling of the breasts and nipple erection, and then enter into a period of sexual persistence, when the breasts will be further swollen. During the orgasmic phase, there is a skin rash on the chest and neck, then further swelling of the breasts and a feeling of soreness in the breasts. Finally, in the sexual recession period, this time the swelling of the whole body and breasts will subside, and the soreness will disappear, so the breasts will feel sore during orgasm.