Found cock ring in husband’s work pants

I’m coming here because I don’t know where else to turn. I’ll try to make this short:

Yes I know my husband has cock rings. We have a very good sex life and use them often. HOWEVER, I found one in his work pants (on several occasions over the last few months.)

I know and accept that there is a chance he could be cheating. I get that, but I highly doubt it and I’m wondering why a man would use a cock ring outside of the bedroom… if at all? Excuse my nativity here, but I just can’t wrap my head around why he would take it outside the house. We are very open about everything and talk openly about sex and what we like, ect. He does use a penis pump for gains (no ED issues at all) even though I tell him all the time he has absolutely no need for that. It’s in his head that he wants to be ‘bigger’ so I don’t argue with him on it. Could the two be related??

I just need to know if there are any other reasons he may have one in his pocket before I accuse him of cheating. We have a great relationship overall, but a while back he was talking inappropriately to a woman on Instagram. So naturally my mind has gone wild. I could use some insight from anyone who uses them.