'homosexual agenda' =? REALLY, spjunk?? C'mon that's common vernacular no?
why don't you 'believe' in defining such a broad phenomena? I'll agree, sexuality (can) = 'MMMMM BABY', but as someone who finds bi/gay to be 'meh' at best and hetero to be tops, and is fascinated by such stuff, I suggest you get over your silly 'don't believe in defining it' mindset and get on to defining it. Whether you're trying to learn about sex in general, or yourself wrt sex / sexuality, defining it is the 1st step in understanding the broader ideas involved and, as such, is foolish not to pursue if you give a damn (which most red-blooded folk do)
edit to add: note that the last paragraph isn't only relevant to gay/straight dichotomies, but to 100% hetero/gay relationships as well, I mean even in a man/woman relationship there is such a treasure trove of psychologic:attraction criteria/norms that you cannot help but be enthralled for a while learning them.