Masturbation. Coming out from washroom?

It is said that during the time of masturbation one shouldn't take any anxiety, feel fear for something that someone will come or what anyone will think but i stay in hostel with my roommates. If I go for masturbation and and come after 10 to 15 minutes, they start staring at me with suspicious face. So i once decided to leave it completely. I was on celibacy for 49days after dat I masturbated. N yes aftr that without start n stop method I could masturbate for 10mins with normal speed. By the way I do only once a month but now I am thinking to increase my frequency. I think it should be once in a 15 days. I do pranayama n savasana... Kapalbhati for 15mins n anulom vilom 5 to 7 mins.. I do savasana.. I take right sleep.. I sleep by 11 and wake up by 6 to 7am...what is your opinion on being judged after coming out from washroom? How to deal with that... Thanx