The next sentence: Soy vegetariano. As a woman you say soy vegetariana.
You like eating soya (soy) and drink from a huge fir-wood beaker with a pineapple floating in it, its rim as round as an O (vegetariano – from the German “Becher”, “Tanne”, “riesig” and “Ananas”: “beaker”, “fir”, “huge” and “pineapple”). That is the masculine form. If you are a woman, there is no O at the top; instead you are pondering whether you should drink it (vegetariana).