2 plants in same pot?

can i grow to plants in the same pot? like 1 right next to the other... i was thinking the roots would grow together, and it would make a plant with 2 big main branches.. but i don't know...
would this work?

sounds intresting, but I've read that If you puto 2 plants too close together increases the chances of getting males

1 plant per pot, one plant will kill the other one for root space, the roots tangle up.
havent you got 2 pots, if so i would say to use them, before the plants start to spread there roots.
say 1 gets sick, it will pass it to the other plants in the same pot, as if it was the same plant.

you could just grow one and topp it.
if you top 1 time you have 2 main heads, and if you top that 4 will grow.
i have 1 plant with 16 main heads, and its like 4 plants in one.
if you need any help topping just ask.
plus you can keep them small, but with more buds.
its hard for lower parts of plants to get the light.
if you top you have more main colas getting equal light, more uniform.

Man i just went over to my friends house 2 weeks ago, shows me his room and he has 2 plants per 3-4 gallon pot, and i argued with him how its definatly better to use one plant per pot, but he tried to say they grow together, haha hes in week 4 or 5 of flower and seems to be doing alright, but either way i wouldnt do it... All im saying is it can be done