For me it started in boy scouts. We took turns in the tent masturbating each other. That was middle school age. Later in life had easy access to porn and went to "taboo" adult bookstores. Ended up using some dildos. Later on ventured into some adult theaters with glory holes and more. In total have jerked three guys and sucked two. It's odd because as much as love fucking and eating pussy and ass.... I crave sucking large cocks. But only large cocks.