is attached, comes with
お風呂はついてますか。
Does it have a bath?
朝食はついてますか？
Is breakfast included?
襟に染みがついてますよ。
There's a stain on your collar.
頭は体についてます？
Is your head attached to your body?
— どん底作家の人生に幸あれ! (2019)
よく見せて何の疑いもなく体についてます
It looks natural and sticks to the body without raising any suspicion.