"Right... Gender, Trade, Once per turn..." and then looked to his girlfriend and Brian's head slowly tilted upwards as he shrunk a few inches and his girlfriend grew several inches. Brian could see Maria's face grow more masculine and even a bit of stubble growing on her chin that as the changes past he found kind of attractive. After the changes seemed to stop Brian notice his attraction to this... mostly man. It seemed like the breast growth remained, and while the base B-cups shrank away to nothing it still left Maria 6 breast sizes that left her with slightly more shirt covering her torso. Although with the increase in size arguably Maria was showing off more skin.
Maria's now deep voice said "Wow you look like a cutie." Brian then looked at himself and quickly saw her slender arms and hands with his long sleeve shirt hanging loosely on his form, and then there were two slight budges on his chest tipped with some points. Now that the shock was wearing off she could feel the fabric of the shirt on her nipples and it felt weird and uncomfortable to Brian.
Brian feeling a little flushed said "Could you take your turn!?..." and then grasped his throat as he heard his much higher pitched voice that sounded... cute...
Maria stood up and towered over Brian and said "I could take my turn and go back to being a girl... or we could have some fun... Maybe a bit of dress up... maybe a bit of cuddling..." Maria leaned in and said softly with his deep voice "Maybe fool around a little... See what if feels like on the other side... or there's another option."