Mess around with them
'mess around with them' could have a sexual meaning as in mess around with them meaning having sex without any strings attached or having sex with strings attached.
"the boys and the girls are here, i mess around with them, and I'm okay with it"
It being phrased like this would mean the speaker is saying that he/she is bi (bisexual)
It being phrased like this would mean the speaker is saying that he/she is bi (bisexual)