Although I experimented a bit with others of my own gender when I was younger (and in fact got kicked out of the Air Force for it in 1983), I consider myself asexual. Whereas I love TUGs and have an even stronger obsession about being sat on, my desire for what most people would consider to be sexual contact is non-existent. I'm not repelled by it; but I'm not attracted to it either. My fantasies involve just TUGs - and being sat on. I rarely if ever imagine engaging in oral sex, definitely never think about anal sex, and just about never fantasize about vaginal sex. And I am perfectly fine with that. I miss the occasional cuddling I used to engage in, but that (and, yes, being sat on) about all I miss. My sexual drive even in adolescence was never very strong, which probably greatly impaired my already dysfunctional social life from having Asperger's Syndrome.
And even TUGs are just fantasies to me now; I've engaged in no TUGs since my early 40s and undoubtedly will never do so again for various reasons (including but not limited to health reasons and social ineptitude). Unlike sex, TUGs I DO miss!