No, kissing your sister on the lips is generally considered inappropriate.
Cultural and Social Norms
Most cultures view lip-to-lip kissing between siblings as inappropriate. This practice is typically reserved for romantic or sexual relationships. While some families may have different traditions, the prevailing social norm discourages it. One source notes that "It is not considered appropriate to kiss siblings on the lips in most cultures." [Quora: Is it appropriate to kiss siblings on the lips?]
Potential for Misinterpretation and Discomfort
Kissing a sibling on the lips can be misinterpreted and cause significant discomfort. It blurs the boundaries of a healthy sibling relationship and can lead to misunderstandings and even psychological distress. As one source states, "Kissing your sister with a lip lock could be seen as a violation of social norms and the boundaries of a healthy sibling relationship." [Quora: Is it wrong to kiss your sister with a lip lock?]
Alternatives to Lip Kisses
Affectionate greetings between siblings can be expressed in other ways that are widely accepted and don't cause confusion or discomfort. Hugs, cheek kisses, or even a friendly pat on the back are all appropriate alternatives. One Reddit user points out that "It is 100% normal to kiss your little sister on the cheek and for her to kiss you back." [Reddit: Is it weird that I kiss my little sister?]
While some individuals may have different experiences within their families, the potential for misinterpretation and the generally held social norms strongly advise against kissing siblings on the lips. Exceptions may exist due to cultural variations or unique family dynamics, but these should be the exception rather than the rule. The overriding consensus is to avoid lip-to-lip contact between siblings.
