When you pee your pants like that, it doesn't feel very good, does it?
When you go pee in your underwear, it feels yucky, doesn't it?
ーWhen you pee your pants like that, it doesn't feel very good, does it?
「パンツでお漏らししたら、気持ち悪いでしょ?」
pee one's pants で「パンツにおしっこする」=
「お漏らしする」
doesn't feel good 「気持ちよくない」
ーWhen you go pee in your underwear, it feels yucky, doesn't it?
「お漏らししたら、気持ち悪いでしょ?」
go pee in one's underwear で「下着におしっこする」=「お漏らしする」
feels yucky で「気持ち悪い」yucky は「不快な」という意味です。
ご参考まで!