Have you ever had a mutual wank with a cousin??

No, had a cousin who showed me his and wanted to wank together but I was too shy and did not feel comfortable doing it. Wish now that I had. I am sure we would have had lots of fun cumming together.

My cousin and I grew up together. Once we hit puberty, we would compare our cocks. Eventually we would jerk off together looking at porn magazines. We then agreed to jerk each other since it felt so good - once we got girlfriends we never did anything sexual together.

With 3 cousins at different times and always in summer. Once 2 of them met me and we made a jerking circle when we when we shower together. We were filled with cum between the 3 of us. We had more cum than soap. 3 cocks together is very arousing, and they were still hairless me 16. But it was all natural, just enjoying our spontaneous erection. Unrepeatable moments.
Being naked with other guys is not a bad thing

Cousin no, brother yes.

Best thing I ever did was be taught by my cousin to wank.
Wank every day now.
All up my chest too.

My cousin (same age) started out jackingoff together, then jacked each other off and finally started sucking each others cock. This went on for years, my first experience in sucking cock.

Yes blew hundreds of loads together for a few years.