Honestly, it’s so very rare that I would meet someone I’m remotely interested in, and sexual attraction comes later for me, after I have feelings. So for me this has only happened three times in my life, and I’m in my 40s. Only one of them I loved so deeply, since we broke up, I have zero interest in meeting anyone again now. So I don’t really get this whole “desperate looking for it” thing, to begin with. But the thought of someone not only looking for it, but finding it multiple times in short periods, indicates they are not at all fussy, or they just like shagging around. So that’s point one.
point two, if they are dating me and it’s got intimate, even emotional connection where we are building up to a kiss and more, if I discovered they were essentially doing the same with other women, they’d be nothing but a player to me. I wouldn’t have to have an “exclusive chat”, the right person for me, it simply wouldn’t enter their head to do such shallow acts, and by their very doing it, I would know they were not high quality, not that into me, and not worth any more of my time.
so OP you don’t have to ask “is it cheating”, you just have to ask, is this man up to my standard, on the same page as me, emotionally intelligent enough for me, genuine and sincere in his pursuit of me. If he’s been shagging others, the answer is no, ditch him and let him find a woman who has the same standards as him.