Avoid situations where the obvious rhyme-word is “maidenhead.”
If you look at the calendar and discover it’s May, stay home.
If you are a young lady do not allow young men into your garden. Or let them steal your thyme. Or agree to handle their ramrods while they’re hunting the bonny brown hare. Cuckoo’s nests are right out. And never stand sae the back o’ yer dress is up agin the wa’ (for if ye do ye may safely say yer thing-a-ma-jig’s awa’).
If you’re a brunette, give up.
Not that being a blonde will improve the odds much.
If a former significant other turns up unexpectedly after a long absence, don’t throw yourself into his/her arms right away.
That goes double if they refuse to eat anything.
Triple if they turn up at night and want you to leave with them immediately.
There's more there. Some of them do have you wondering just how specific the reference is to a song, but that's all in the fun of it. The commentors contributions are also worth the time.