Yes, it can really wear you out and cause pre-mature aging on your and your partner's genitals. Cut back just a little bit, and do more sensual things like massinging and other activities pre-sex to help warm you up. It will make the feelings last and will most likely satisfy you and your partner much more.
It won't hurt you but it might wear you out.
Havin sex 5 or 6 times a day.......may look like a bit strange..
but this is for sure it will not cause any problem....if u r happy with this...then u continue enjoying the good times with ur man.