Some of the reasons given by some men
that they don't like male condoms:
1.) Once the foreplay has begun, stopping to put on the condom is a serious interruption.  (Women have also said this is true.)
2.) They are made too small.
3.) The ring at the top is too tight.
4.) The sensation of touch is reduced.
5.) Being as a guy can't keep them in his wallet anymore, they are a #*&!# to carry around.   (Hey, maybe this is why women buy most of them -- they have purses.)
6.) The male sex organ can tell the difference between wet and dry; the inside of a condom is dry.
7.) Condoms have unappealing smell, taste, and the touch is greasy.
8.) Condoms must be properly applied, with motor control skills, smooth clean hands and light.    Not all these factors are available for every man, every time.
9.) Sometimes a condom can slip off from pre-ejaculate fluid.
10.) The cost -- it's one more thing:  flowers, gas, dinner, movie...and condoms.