The fear of intimacy part of that quote just refers to INTj's who are not involved in a relationship and refuse to whore around like a lot of other people. It is safe to assume that an INTj that finds a good relationship will fuck like rabbits constantly to make up for lost time. I find it strange that you would interpret that paragraph as a low sex drive in general.
ILI (FINAL ANSWER)
Derp de derp
A good joke at that
ILI (FINAL ANSWER)