初吻给了我妈买的奶瓶
[chū wĕn jĭ le wŏ mā măi de năi píng]
It is a creative metaphor indicating a very innocent upbringing experience. The person might be trying to say his first experience with lips being used affectionately was feeding from a baby bottle bought by his mother rather than any romantic kiss which suggests it remains something simple, innocent or childish.