My brother and I first started getting a hard-on when we got an enema, around age seven. We didn’t get stiff in the beginning until an index finger was buried deep in our anus for lubrication, before being replaced with an enema nozzle and the flow started. Our sister got to watch mom as she slid her finger deep in our anus, then started moving it around as our penis got stiffer and stiffer. When it was our sisters turn, my brother and I got to watch as mom slid her index finger deep inside her. The thing we had in common with each other, while being lubricated, was wiggling around as we moaned. Even at that age, we were anal erotic and enjoyed a finger deep in our rectum, especially if it was moving around. Boy, did it ever feel good. Our sister being curious, asked mom why our penis got bigger as it got stiff. And mom replied, “That’s normal for little boys.” As we got older, my brother and I started getting a hard-on when told we're getting an enema. Something that wasn’t missed by our sister. Prompting her to start asking questions again, and mom replied, “That’s normal for little boys during an enema.”
When we spent four to six weeks during summer vacation visiting with our grandmother. We got enemas from both grandma and our teenage aunts. Grandma gave us enemas laying naked on a towel across her lap. However, because our teenage aunts had been given the responsibility of doing our evening bath, including spankings and enemas when needed. They used the big downstairs bathroom because it had a large walk-in dual head shower. Making it convenient for the girls to put us in the shower together. Then one or both girls got in the shower to bathe us and keep order. The first thing that happened, once in the bathroom, was to get totally undressed. This included our teenage aunts because as a rule, they got in the shower with us. Next, if we’d gotten in trouble during the day, the girls gave us a spanking laying naked across their bare lap. Then an enema to help calm down before our bath.
Laying naked across their lap felt good, but at the same time, felt naughty. We didn’t understand what it was about, but as we got closer to puberty, it became more enjoyable laying naked across the girls lap receiving an enema. It was scratching an itch we had yet to understand. The fact that we had a hard-on laying nude across their lap, was a thrill in and of itself. So, as my brother and I were laying across their lap naked, there was no way they could miss feeling our stiff penis against their bare thighs, just as we could feel their bare legs on our groin and their bare thighs against our hard penis.
It really became obvious, when grandma switched us from getting enemas laying across a bare lap to naked in the knee chest position. When that happened, the girls started using the knee chest position but preferred giving us enemas laying naked across their bare lap. About the same time, we noticed the girls making excuses in order to give us enemas that weren’t necessary. They enjoyed giving us enemas laying naked across their bare lap, realizing we enjoyed it as much as they did. Even though they started using the knee chest position as grandma wanted, they continued to give us enemas laying naked across their bare lap, especially if they weren’t necessary or needed. Something we didn’t mind because we enjoyed them as much as they enjoyed giving them to us.