"Breasts". He clicked "Breasts".
Like most men he was... quite interested in that part of the female anatomy. And this... this was an opportunity to get very intimately acquainted with it!
He looked through the options presented to him at the next screen. There weren't very many of them which he considered a good thing. In the end, he did get a kick out of giving up control.
The very first choice asked which breast he'd like to become. A drop down menu offered the expected choices of 'left', 'right' but also 'both'. He liked the idea of symmetry, plus he also thought it might be interesting to experience being split into two pieces... and so he chose 'both'.
The 'owner' box was empty. He didn't have any particular women he'd want to become the bust of. Luckily there was also a checkbox labeled 'random' next to it. Clicking it opened up two more fields: 'Age' and 'Size'.
He entered 19 for Age. He wanted to become breasts that are mature enough to be fully developed and yet youthful enough to still have their perkiness. As for the size... he thought a bit about that one.
He knew that boob sizes came as a number and a cup letter. One day, his ex decided to go into excruciating detail about how bra sizing works, after he made some casual remark about her breasts which was wildly off. Now he was glad for this lecture.
First, the band size - reflecting the size of a woman's ribcage. He knew most women are around 32-36, with 30 and lower being rarer. He also knew from his ex-girlfriend's yadda-yadda that girls with smaller band sizes frequently had trouble finding a well-fitted bra. Something about that made the idea appealing to him. He didn't want no bra to define his shape once he becomes boobers! The thought made him chuckle.
Then came the cup size. He definitely wanted to be noticed as a breast. He wanted to make sure his owner can't ignore him. Finally, he was aware that large boobs can be pretty uncomfortable - he wanted to be helpless but to experience some of the discomfort of being a set of heavy boobs with all the bounce and jiggle that comes with it. He selected a D-cup.
But then he remembered that contrary to what most guys believed a D-cup wasn't always the same. The cup actually meant how much difference there was in circumference between the girl's rib cage and her bust. So a D-cup worth of difference would mean smaller boobs on smaller band size and bigger boobs on bigger band size. Knowing he selected a pretty small band size made him concerned that maybe D-cup would actually turn out too small. And so he bumped it up. First to F-cup. Then to G-cup.
Eehh... Whatever... Let's just do it. He whispered as he deleted the 'G' he wrote and typed 'HH' instead (something he would regret doing later).
The last field on the form was for "other comments". He thought for a second and then wrote a couple sentences which, he thought, would make his experience as somebody's breasts even more exciting and even more out of his control.
"My host is a flyer in a professional cheerleading squad" he typed out getting excited again at the prospect of all the bouncing around she will subject him to. "She is dating a man who really loves pawing at her breasts and.. is really into titty-fucking ."
He thought all of that would give him an experience to die for. The last field was for the transformation duration. He thought for a second and selected one month.
He clicked start and felt a weird energy pulsate from the device