IMO, 4 times out of 5 changing pronouns is for insecure people, but there are reasons.
"You know I like my girls a little bit older"
The song's about the complications of love, faithfulness, closeness, and emotions. Doesn't matter the gender.
This song is about how it's socially edgy and somewhat taboo to kiss people of the same sex in mainstream culture. Changing the gender to keep in homosexual preserves the original intention and feel of the song.
If the nature, intention, or message of the song is linked to the relative genders of the singer and the lyrics, then you should swap.