Getting oral sex while on period includes the days leading up to, including, and immediately after ovulation 7. She has done things for me before and I kind of want to do this for her too. Giving your girl oral while shes on her period serious alright I dont have any problem having sex while she is on her period. The fertile window is the days in your cycle when pregnancy is most likely to occur. Skip to main content. Menstrual blood can be a great lubricant.