Responses

In the MC's case, it's a hormone thing so it could happen for a lot or reasons. It could be because of his heat so he's more sensible when touched, pregnancy and the secretion of milk or other liquid similar to milk, or even because they're so swollen that any kind of contact makes them itchy and hurt. Boobs when in menstrual period experiment all kind of things too like sudden pain, itchiness, get bigger and swollen, acne outbreak, etc.
And about the itchy tits during sex, does that really happen to some people? I’ve never felt or heard of it before. Is it like how some people get tender breasts before or during their period?