going to rant about various sexualities just wyat confuses me abiut them

okay demisexual first okay- im just confused that , how do you get sexual attraction but not,, romantic??? like is it just pure lust?? do you actually in love with said person???you just want seggs??? what poly I'm just confused as what happens if the other two in the relationship don't love each other

they them lesbian, he him lesbian what>???? isn't lesbian only for wlw or is the white for all genders?? if your a boy who likes just girls aren't you straight??/

like I'm not tryna invalidate anyone oh my God no I'm just confused