My girlfriend and I live together, but I still jack off about 4-5 times a week. Sex and blow jobs are great, but a man still needs to pleasure himself on top of that. In highschool I've done the how many times can I do it in one day and my dick was very sore afterwards. I think I got out 6 that day.

Anyway, you have nothing to worry about other than the possibility of chafing real bad.