Clara looked at the options and all though the obvious change to do was appealing (giving men breasts), she saw one that really peaked her interests. There was an option to give men internal testicles. She found it hilarious for a number of reasons. First, men would no longer call to "grow a pair" or have "big balls". And she always thought testicles were disgusting looking anyway. Plus, men would probably enjoy not having to worry about getting hit in the nuts anymore.
Clara looked over at Jeff, "Hey Jeff maybe we should get naked so we can enjoy watching the changes?"
"Great idea babe!" Jeff quickly tore off his shirt and pulled down his jeans. Clara looked at his bulge as Jeff slowly took off his underwear, thinking it will never be the same again. She was getting hot just thinking about it. Clara then pulled up her shirt and dropped her tight fitting jeans and removed her bra and underwear. Jeff got an erection pretty quickly seeing his girlfriend's boobs and pussy.
"Ready Jeff!"
"Woah, you're not going to tell me how you're changing us men?"
"I figured it'd be a surprise!"
"Sounds good honey. Let it rip!"
Clara hit the option for internal testicles and clicked save. Soon Jeff could fill something odd with his groin.
"Really, you're getting rid of my dick right away?"
"Not exactly darling..."
Jeff then looked back down and noticed that his baseball sizes balls were now the size of ping pong balls and getting smaller. Soon his ballsack was completely empty and then his scrotum began to smooth over. Jeff's dick looked bigger despite his lack on balls.
"So, more more balls." Jeff said as he examined his new crotch. "Interesting."
"Technically, you still have them," Clara pointed out, but they are internal like my ovaries."
"Well, I will not miss getting kicked in the nuts, but its still weird." Jeff was hard as a rock, but he tried to let his dick go soft as he contemplated what to change about the female gender.