How about 'no' piece swimsuit, or if it must be a number, how about a one piece, the skin we were born in.
We would rather have no sand in our bits, than worry about what we ALL have....wobbly bits.
Besides, when we are talking to someone, our eyes are looking at the face, not elsewhere.
Mine/all ours like yours is 'one piece......hee hee... oh c'mon, smile, we all swim naked in the bath or shower. It is just some of us swim everywhere in our 'skin one piece'.
No pressure but.....