Semen gets stuck in penis during ejaculation?

When I reach orgasm, I feel the orgasm, but not as much semen comes out as expected, only small amounts are released. Then, afterwards, if I sort of lightly squeeze my penis in an upwards direction, a good amount of semen comes out as if it was stuck somewhere. This has not always happened for me; I noticed it first after waking up after a wet dream in which not much came out and then finding it was stuck and ever since then it has persisted (in masturbation too). Any ideas of what the cause is? Or where the semen is clogging up? Or what I could do to treat this? Thanks for any input.

umm its normal if ur not cirumzised by bf has that to.

Dang, those little sperm can sure enough get hung sideways. I always use a vacuum cleaner but I wouldn't recommend it. Perhaps your g/f can help.