I answered yes, but I have two reasons. 1) I live at my grandma's house and our room has a door to the basement - which is my aunts bedroom. I get tired of being walked in on & I get tired of the boring positions. 2) I've only been off of anxiety meds for a month, so my sex drive is still up and down and when it's down, I just do not like having sex, but I do it for my boyfriend anyway. Sex without wanting it isn't fun.
For me I don't get tired of it because it's boring, it's never boring. For me to have sex, it takes a lot to get warmed up, or sex hurts and it's just excruciatingly painful. For this reason, sometimes I would rather cuddle and watch Family Guy than have sex. Thankfully I have a man who understands that and doesn't hassle me about it.
After our daughter was born, my husband and I totally fell out of our groove- it's SO amazing to be fucking almost nightly again (four years later,) I can't even imagine being sick of him (and it.) It's like our relationship got rebooted.
I never tire of sex - but sometimes I am too 'tired' for a repeat performance. Tired is not the right word - it's just that as I've gotten older the 'refractive' time from orgasm to my next erection has gotten longer.
There were definitely times, usually when I was having a lot of random partners, that I got really sick of sex. I do believe there is such a thing as being over-sexed and I have definitely reached that point before. Usually I'd take a few weeks of relative celibacy (some masturbating, but less than normally I'd say) to regain an interest. Also stress and depression can make sex seem rather boring to me.
i've had boring sex, but i haven't gotten tired of it. impossible! even when i was working, it was more of a sport, but nothing to get tired of. there's always something new to learn or some new way to pleasure or new experience or new emotion. there's always something new.