Hey there,  I have noticed that since about 4 months ago I have a few white, non painful or itchy, a bit hard to the touch, pimple like bumps on the shaft of my penis, head of it and near the rectum. These pimple like bumps aren't "Squeezable" like a normal pimple but if I use  tweezers or my fingernails to pop one open, a ball of "hard" white substance comes out.  They have not been here before and i am wondering if this is an STD and if so if it's treatable.  The bumps remain in the same place and do not seem to subside for now.  I will note that I am sexually active bisexual male.  Thank you for your help!