8 Mar Anal sex requires comfort and patience. The best way to prepare for pleasurable anal sex is through anal masturbation. Here's a step by step how to guide. Anal masturbation is an erotic stimulation focusing on the anus and rectum. For humans, common methods of anal masturbation include manual stimulation of the anal opening, and the insertion of an object or objects such as fingers, phallic shaped items, water play, or sex toys such as anal beads, butt plugs, dildos. This is by far the most common clinical group, and the cause of the bleeding often may be distinguished on the history alone. Anal fissure Anal fissure occurs at any age and usually is due to constipation (Chapters 22 and 27). The child passes a large, hard stool which splits the anus, usually in the midline, either posteriorly.