Hello there. I can understand your concern . It is not a matter to ask whether its harmful or not . even kids these days know that its harmful . i would suggest you to kindly consult a psychiatrist in person for counselling and further management . always remember " too much can be too bad " . best regards . Dr . Anil Kumar Jain. Bangalore.

You need a counselling One shouldn't keep sex as a pastime AIDS is an already intimated death sentence Having multiple partners will invite multiple problems  sexual,psycological& financial problems

Hello, I went through your query, yes multiple partners and unnatural sexual intercourse (through anal route), could increase the chances of acquiring sexual transmitted diseases by several fold. You can change this habit to some other healthy useful activities like sports, playing games with friends, joining gym, other recreational activities.