There's also Grindr, and the like, for quick hook-ups.
Websites such as BateWorld, which has a very large straight membership, where men can meet in Video Chat rooms and whack off together.
While the Internet has made it more acceptable to masturbate in the first place, our digital world has also made it easier for guys to arrange to get together for some mutual enjoyment of the most common activity in the history of humankind.
Many straight/married men loathed the idea of someone they knew seeing them going into a place known for hosting such activities.
Not that you'd find any signs on doors advertising the fact, but word does have a tendency to spread about certain establishments.
Now, they can simply go "hang out with the guys" without the fear of any stigma attached,
without needing to answer a ton of questions about why their car was seen parked there, or why they were seen going in the door. They can just go and enjoy the time with their friends.
And, a complex issue becomes much more simple.