It's a lot to absorb all at once, but Laertes follows as well as he can, creating the schema in his mind and mentally pinning each term to a person so that he has a mnemonic. (He doesn't think he knows any lesbians; even Sappho famously had both male and female lovers.) "A part of me had thought that all people must be bi, or there could be no sin in loving one's own sex," he admits. "Just as all of us may covet, or steal, or kill--that which is forbidden is that which any might do. I do not say it is a sin," he hastens to add. "Only that it seems strange to forbid a temptation to which some cannot be subject. But thou sayest some love only one sex?"