49 and younger bf

Just wondering does it matter if your bf is younger to get pregnant.. or is it all me n my eggs. Lol.. he's in his 20's and I'm 49.. One day he didn't care about pulling out 3 days after my period ended.. now I'm kinda worried..We been together for a year now and we are happy together. We live together and we're doing good. We get a long great.. we're at the point where he thinks it and I'll verbalize it.. or vice versa. I know my chances are 1percent.. but does it matter if he has young good swimmers. Lol