You need to see it in the context of Type 1 as well.

The idea of "Sexual" is mostly Sx/Sp 2/3/4, 7, 8, and often Se ego ("sensual", "physical", etc) Very different from Type 1.

Sexual 1 is about "zeal", the passion for your moral causes. Jordan Peterson is known for shouting and even crying during his talks or interviews. He loses composure too often for someone who is supposedly So/Sp 1.

Arguably, alongside 5, the Sexual 1 is one of the least outwardly "sexual" subtypes, for the 1 has strong ideas about what is appropriate or not, they are going to be self restraining and put their Sx energy into something they deem morally righteous.