No. Drinking semen does not harmful to your body and you may give him blowjob if you like it as this is the matter of personal preferences. Please make sure that you boyfriend's penis is hygiene and surrounded area is clean. You may give him blowjob even every day.
I would like to advice, you do not only practice blow job as that will make your relationship boring after certain time. You may spend quality time sometime, romantic talk even more helpful, make a plan for movie, shopping etc as these all things are similar important in the healthy relationship if you have planning to carry your relationship further.
I would like to advice, you do not only practice blow job as that will make your relationship boring after certain time. You may spend quality time sometime, romantic talk even more helpful, make a plan for movie, shopping etc as these all things are similar important in the healthy relationship if you have planning to carry your relationship further.