playing with a laptop in your lap often is going to make you shoot blanks... (it'll kill your little gametes!)
so would extreme cold for x-minutes per day too, btw. Cheap birth control? it really does work, you can check on the biology. they don't do well outside a very specific range of temperature.
if you don't need portability... desktop hands down, all day and twice on sunday.
if you need portability - laptop.
you get 10x the hardware for th same price as a laptop.. enough said on that. also, you can make sure you get a hdmi out and hook it up to your 4k big-screen tv if you have one. or any other digital hd tv too.
wireless keyboard and mouse, and you can hide the tower behind your tv cabinent or in a corenr of room etc. this reduces noise too. just make sure it can get air for intake fans and fans blowing out have space too.
so, 10x the hardware for same $$$ and you can chill on your couch playing in comfort and not reducing your ability to procreate.
laptops are great too
if you need portabilit.
oh and just put it together youself, don't buy a big box brand... stuff only fits in one slot.. a veritable dummy can do it nowadays. you can find numerous youtube videos too, i'd wager (not a youtube person but i hear how-to is common stuff to find).
otherwise you only get 5x what a laptop of same price has and you get junky components inside you have little choice about... you get exactly what you want putting it together.