Dance Undergarments I Have Second Date, Who Loves To Dance, But She Wears No Undergarment Should I Tell Her It Embarrasses Me?

I have second date, who loves to dance, but she wears no undergarment should I tell her it embarrasses me? - dance undergarments

I have mixed feelings because it's so funny (flip them around like yo-yo master), to me, smiling the whole night, but very uncomfortable leaves.