Sudden jump in sex drive in my partner?

So me and my partner split up for four days a few weeks ago. Throughout are relationship he always said he had low sex drive and ED problems so we didn’t do it very much. Well all of a sudden when we got back together he’s been having a very high sex drive. Idk we haven’t been arguing sense we got back together bc I have had an idc attitude well more free spirit. I haven’t exactly been super loving either. Is this dramatic increase a red flag or? What’s your personal advice. I’m not saying I hate it just odd all of a sudden after we split up.