SO talks about Exs

Leanna
So my SO and I have been dating for a month and the other night the subject of Exs came into our conversation. He mentioned this "redhead" (thats how he identified her) who he dated for 8 months but broke up with her because "it didnt feel right". But hes also said shes like the one that got away. I feel weird when he talks about ex gfs cause I cant tell if hes like trying to make me jealous, or if he's trying to be open with me, or if he thinks hes making me feel better because Im with him now and not these other girls. Hes also told me about going out and these girls coming up to him and not being attracted to other girls anymore. The thing is i dont care how many girls try to sleep with him because i already trust him not to fuck around. So idk if im over reacting or if i should be worried or idk what. I dont want to say anything either because we're so early in our relationship. Whats your opinion?