might have to
This is part of a
coded reference used to mask the outright saying of "giving oral sex or having sexual intercourse". The idea is to say you "might have to" and then follow it up with something completely unrelated to anything of a sexual nature. The more bizarre, the better.
So its like a leading response in a conversation about trying to
make someone happy, or owing someone for something they did for you, or trying to find
forgiveness, and a way to show gratitude. See the examples given....