In an interview, he said that before he did porn he had only ever had one sexual experience with another man, who purportedly volunteered to give him a blowjob. Jack did porn for a few months in 2014, then quit for a year and returned this year.
That suggests a variety of possible scenarios. He had a girlfriend who didn't want him doing porn, but then he dumped her. Or he was confused by his sexuality and realized he liked pounding blokes in the ass, so he took some time away to process that.
Most likely, at least in my opinion, is he both liked the money and also the idea of pretending to be entirely straight while secretly enjoyed fucking men more than women.
The originals for these photos are larger than they appear below and are part of a set with nearly one hundred images of Jack fucking four lads in different photo shoots plus a fifth shoot of Jack alone with his right hand. To download the complete set in a free zipped folder, you'll want to click here