Someone said :
Stop having sex with him and spike the lube with something, look up google for the best ideas . Something that will bring him and his partner out in a harmless but huge rash .
With any luck youll scare the shit out of them and identify his love cheat as well.
You realize that the malicious administration of a noxious substance is an offense?
A person shall be guilty of an offence if, knowing that the other does not consent to what is being done, he or she intentionally or recklessly administers to or causes to be taken by another a substance which he or she knows to be capable of interfering substantially with the other's bodily functions.
And if the other party happens to be strongly allergic that what Google may have told you will only give them a rash, you can be sure that it will lead to more than 3 years in jail for interfering with their bodily functions.
(I love the older statutes that said "Maliciously administering poison, &c., with intent to injure, aggrieve, or annoy any other person." The do better justice to the whole experience)
Is you excuse going to be that I do not understand the meaning of "noxious", "malicious", or "jail"? (Even Peter Casey is more subtle...)